Press advertising is the most suitable media for image building, information dissemination, and sales campaigns. It is a powerful communication tool that allows businesses to reach a wide audience and convey their message effectively. Here's why press advertising is the correct answer:

1. Image Building:
- Press advertising offers a platform for businesses to create a positive brand image and establish their reputation.
- Through well-designed and targeted advertisements, companies can showcase their values, differentiate themselves from competitors, and position themselves as industry leaders.
- By consistently featuring in print publications, businesses can enhance their credibility and build trust among their target audience.

2. Information Dissemination:
- Press advertising allows businesses to communicate important information about their products, services, and promotions.
- Through advertisements, businesses can provide details about their offerings, pricing, features, and benefits to potential customers.
- Newspapers and magazines have a wide readership, ensuring that the information reaches a large and diverse audience.

3. Sales Campaigns:
- Press advertising plays a crucial role in driving sales and generating leads.
- By creating compelling and persuasive advertisements, businesses can attract potential customers and encourage them to make a purchase.
- Advertisements can highlight discounts, special offers, and limited-time promotions, creating a sense of urgency and driving immediate sales.

4. Wide Reach:
- Press advertising allows businesses to reach a broad audience, including both existing and potential customers.
- Newspapers and magazines have a wide circulation, ensuring that the message reaches a large number of readers.
- Additionally, press advertising can also be targeted towards specific demographics or geographic areas, enabling businesses to reach their desired audience effectively.

5. Tangibility:
- Press advertising offers a tangible form of communication that readers can physically hold and refer to.
- This allows readers to engage with the advertisement at their own pace and retain the information for future reference.
- The physical presence of the advertisement enhances its impact and makes it more memorable compared to other forms of media.

In conclusion, press advertising is the most suitable media for image building, information dissemination, and sales campaigns. It allows businesses to create a positive brand image, communicate important information, reach a wide audience, and drive sales effectively.