Answer:
I would say that the word that gives the most positive connotation to the students is the third one: active.
Explanation:
I chose active because, although it is not the only word that has a positive connotation, I think it is the most accurate according to the context. In this sentence, the word active is used as an adjective to describe the students that, just like Carol, are taking charge of the fundraising campaign. Active, when used as an adjective, means to be engaging or ready to engage in physically energetic pursuits, and it is the most suitable for the context. To be active is to be animated, involved, and this is the perfect way to describe the students who choose to take action in this fundraising process.
