Remark
If Jenny takes option A by a month later between people's problems and her late nights working, she's going to be completely worn out, but her student loan will begin to get paid off. That's a plus.
If she takes B she does not get the career fulfillment that she wants. No job is perfect and that student loan is like a massive weight around her neck. She could do volunteer work on the weekends.
C is completely out of the question. She's piling debt on debt. If she meets with one of life's catastrophes, she will be in real trouble. C is not an option at all.
D
D to me is an option. Working with kids, she will discover, is career advancement enough. If she get's tenure, she's set.
Based on just what is in the question and nothing more, I would pick D. If you are allowed to add circumstances then B is a good choice. Depends on what kind of questions you had before. I'll stick with D, but it depends on what your marker is like. A machine is merciless and expects only one answer. A person might let you say something and give you credit for what you say.
D<<<< answer.