Which sentence is punctuated correctly?

Question

A. Milton wrote many prose works, but is more famous for poetry.
B. In a sequence of sonnets dedicated to his wife Edmund Spenser traced their courtship.
C. Sonnets were new to England, when Sir Philip Sidney wrote them.
D. When Elizabeth I made her famous speech, the Spanish Armada threatened England.

My choice is D

Answer 1

I agree

Answer 2

I disagree. A is correct.

Answer 3

Sorry, Reed, but I agree with the Bot and Emi.

The comma in D sets off the introductory adverbial clause.

A is a simple sentence with a compound predicate.

Answer 4

You are right, Ms. Sue. This is what I get for answering too quickly! Sorry, Emi.