Samuel Clemens, _______ as Mark Twain, was one of the most famous American writer. A. to know B. to

Samuel Clemens, _______ as Mark Twain, was one of the most famous American writer. A. to know B. to be known C. known D. Knowing

The sentence requires a participial phrase to modify "Samuel Clemens" and indicate his recognition by the pen name "Mark Twain." The key is choosing the correct participle form to express this passive relationship.

"Known" (past participle of "know") forms the phrase "known as," which means "recognized by the name." This fits because Samuel Clemens is recognized (passive voice) by the name Mark Twain.

A. to know: Infinitive form, incorrect for modifying a noun.

B. to be known: Passive infinitive, unnecessary here as we need a participle, not an infinitive phrase.

C. known: Correct past participle, forming "known as" to show he is recognized by that name.

D. Knowing: Present participle, implying active action (he knowing something), which is illogical.

Answer: C