Sort of it depends on your point of view of the story
If this were a question on my test, I'd probably go for tolerant or sentimental. I'd probably go for sentimental, because if the sentence had a more tolerant tone, it would say something like "My car isn't the greatest, but I can live with it".
It is a A. simple sentence, because there is only one main verb - opened.
A compound sentence has at least two independent clauses, a complex sentence has an independent clause and at least one dependent, a compound-complex clause sentence has two independent clauses and at least one dependent.
The correct answer is the Nervous system and the Endocrine system. These two systems control all other systems and by doing it create homeostasis in the body.
