Active listening is a critical component of effective interpersonal communication. which is critical to being an active listener
a. sharing your point of view
b. offering examples from your own experience
c. sharing discussion notes
d. sharing appreciation for what is being said

It is D, sharing appreciation for what is being said. Both A and B aren't crucial to being a good listener, in fact in practice they effectively draw attention to yourself, which would be fine if the question was regarding being a good conversationalist. Additionally, C is just completely irrelevant, that wouldn't even be a good conversation practice, let alone a trait important to listening.

The answer is byour welcome: )