Question

c. Has she met them? Does she expect to meet them at all?​

Answer 1

Both are correct under different situations and their tenses are also different.

1. I have met him. ( Focus is not on the time of activity but on its current relevance , result or effect .It does not answer the question “When ? )

2. I had met him. ( Focus is neither on the time of activity nor on current relevance , result or effect.)

Note: In the Past Perfect , sometimes the time expression relating to the past may be implied .