Question

Choose the option that best fills in the blank:

To ___ did you write that email?

• A. who
• B. whom
• C. which
• D. what

Answer 1

Answer: (B)

whom

Since the question is asked about a person who is at the receiving end of action, here, writing emails, "whom" should be used.Hence, Option B is correct. The rest of the options do not adhere to this rule, hence incorrect.