OP, just saying: I somehow doubt that rep was from one of the reachy reaches on your list.
Most advice to premed wannabes would be rigor in cores, esp stem, and relevant math-sci ECs. The competition for most of the colleges on your prior list might have experience researching, something at a hospital or clinic that reflects the work doctors and nurses do with patients. And more.
Why not see what more you can do this summer and fall, not this role in another office. Can your contacts get you into thehospital or clinic environment, where there’s often more urgency in what’s done for patients?
Other parents may have other input, but when aiming for tippy tops, many of those kids arn’t taking the para-professional classes- med coding, anatomy, etc.
See what you can come up with.
In any case, given the option of ignoringthe poor grade or doing something, I opt for that something. If it’s an online class, beats nothing. The difference here is OP wants a college track that relies heavily on all stem skills and thinking/problem solving.
And we don’t want her to be weeded out, when she hits the first math classes in college. We want her to be ready. If you htink this course was confusing, you may be stunned by it, in college.