I believe the correct answer is C. The other answers give outside information that doesn’t correlate with the promoted question.
Answer:
In college, your professors rarely reach out to you. High school educators often take more initiative, and would often check in with you if they notice something off. In college, you're expected to take that initiative and actively network with your professors.
I need to see the following.
The answer is a shift from human and animal energy to energy from other sources.