Answer:

Introduction:
The correct answer is option 'A', William Shakespeare. William Shakespeare is widely regarded as one of the greatest playwrights in history and is known for his numerous works, including the famous tragedy "Hamlet." In this response, we will explore the reasons why William Shakespeare is the author of Hamlet.

Background on William Shakespeare:
William Shakespeare was an English poet, playwright, and actor who lived during the late 16th and early 17th centuries. He is often referred to as the "Bard of Avon" and is considered the greatest writer in the English language. Shakespeare wrote a total of 39 plays, including tragedies, comedies, and historical plays, which had a profound impact on English literature and theater.

Key Points:
Here are some key points that explain why William Shakespeare is the author of Hamlet:

1. Historical Evidence:
There is ample historical evidence to support the fact that William Shakespeare wrote Hamlet. The play was first performed in 1609 and was published in 1603. It is included in the First Folio, a collection of Shakespeare's plays published in 1623, which is considered one of the most important sources of his works.

2. Shakespeare's Style and Language:
Hamlet, like many of Shakespeare's plays, is written in his distinct style and language. Shakespeare's plays are known for their poetic language, use of iambic pentameter, and rich vocabulary. Hamlet showcases Shakespeare's mastery of language through its memorable soliloquies and powerful dialogues.

3. Shakespeare's Authorship Attested by Contemporary Sources:
Contemporary sources from Shakespeare's time, such as fellow playwrights and actors, also attest to his authorship of Hamlet. For example, Thomas Lodge, a contemporary writer, mentioned Shakespeare as the author of Hamlet in his work "Wit's Misery" published in 1596.

Conclusion:
In conclusion, William Shakespeare is the author of Hamlet. The historical evidence, Shakespeare's distinctive style and language, and contemporary sources all support this assertion. Shakespeare's works, including Hamlet, continue to be celebrated for their timeless themes, complex characters, and poetic brilliance.