I can't compromise to seeing you next week because I have a lot of work to do and I don't know if I'll be available.
Explanation:
This question requires a personal answer. That is why I will give you an answer so that you can take an example and, if you believe it necessary, you can change it to your liking.
When you have a compromise it means that you agree with one or more parties to make certain concessions each of them. A commitment or a copromise is something that should be done in a totally effective way, therefore if someone has something that impedes that commitment, they should not commit.
The answer to fill in the blank would be B) Thesis statement because the thesis is like the message the author is trying to send to his readers so they can comprehend his or her text.