The text discusses the act of taking nude or sexual photos and sending them to others, which is referred to as sexting. It emphasizes that sexting can have serious legal consequences for teens, making option C the correct answer.

Sexting
Sexting is the term used to describe the act of taking nude or sexual photos and sending them to others. It typically involves sharing explicit images or text messages through electronic devices such as smartphones or computers. While sexting may seem harmless or even exciting to some, it can have serious legal consequences, especially for teenagers.

Legal Consequences
Sexting can lead to various legal issues, especially for individuals under the age of consent. Here are some of the potential legal consequences that teens may face:

1. Child Pornography Laws: In many jurisdictions, the creation, distribution, or possession of explicit images of individuals under the age of consent is considered child pornography. This is a serious offense that can result in criminal charges and long-term consequences, including being labeled as a sex offender.

2. Age of Consent: Laws concerning the age of consent vary from country to country and even within different states or provinces. Engaging in sexting with someone who is underage, even if both parties are underage, can still be considered illegal.

3. Distribution without Consent: Sexting images can easily be shared or forwarded without the sender's consent. This can lead to harassment, bullying, or even revenge porn, which is the distribution of explicit content without the subject's consent. Laws against revenge porn have been implemented in many jurisdictions to protect individuals from such acts.

4. Endangerment and Exploitation: Sexting can put individuals at risk of exploitation or harm. There have been cases where explicit images have been used for blackmail, extortion, or manipulation.

Preventive Measures
To avoid the serious legal consequences associated with sexting, it is crucial to educate teenagers about the risks involved and encourage responsible online behavior. Here are some preventive measures that can be taken:

1. Education: Schools, parents, and guardians should provide comprehensive sex education that includes discussions on the potential dangers of sexting and the legal implications.

2. Open Communication: Encourage open communication between teenagers and trusted adults. This will create a safe space for discussing concerns, asking questions, and seeking guidance.

3. Privacy and Security: Teach teenagers about the importance of privacy settings on their devices and social media platforms. They should be aware of the potential risks of sharing explicit content and understand the consequences.

4. Reporting and Support: Encourage teenagers to report any incidents of harassment, bullying, or exploitation to a trusted adult or appropriate authority. Provide them with resources and support to deal with such situations.

By promoting awareness, open communication, and responsible online behavior, we can help teenagers understand the serious legal consequences of sexting and prevent them from engaging in risky behavior.