The general point is "Carla is a pleasure to be around." This is non specific.
All other points outline specific attributes that support this statement, referring to her smile and willingness to listen and ask questions.
I think that they will be easiely swayed by the beliefs of other because they have none of their own
Answer:
B. Which
It is the answer to the question
The museum trip, which was a lot of fun, taught the students all about dinosaurs.
I value my family and friends the most because they are the ones who are close to me!