One of Lisa's goals is to get straight As in every class. I am sure she could pass easily with a B and ALSO make the time to relax...or she could keep driving herself in pursuit of the A and very little else.
It's a matter of choices.
I know when I was back in school I was also only happy with an A in everything. A+ was even better. I had a saying with an equally motivated friend, that we never wanted to 'fail' with a B.
Now, if i had been forced to deal with a class like statistics, I think I would have been happy to just live though it. But i was taking my biological science classes that I loved so much and ignoring anything with numbers.