I think it’s C or D. C is more specific. D is saying all of the above which is true, but I don’t think that would be the answer. Since it says to fill up your paper. But it’s your decision
Answer: either A or D
Explanation:
Im hoping you dont get this incorrect so
The last answer sets the most formal tone; "Hello! I was very pleased to meet you at the party last week." the rest are very casual.
C
Explanation: it just is