I had learned in previous lessons that the question word だれ could only be used with the particle が, but now the textbook came up with this question.
I understand that particle に is being used because of the verb 会う. So my question is:
Doesn’t it matter that this is formulated as a question?
Does the rule change when using だれ with verbs whose object is marked by a に particle?
Would it be the same if a wrote the sentence using particle が?