Q1. I know with PMC OFF in the 737, increasing speed means increasing N1. It was the same for EPR on the 737-200 simulator that I did my MCC in too. I believe the question is type independant and is asking about the fundemental characteristics of a turbo fan and not specific implementations. Therefore, the answer to Q1 is B.
Q2. There is no specific limitation in the 737 AFM (for example), but the MEL does prohibit assumed temp T/O in such cases. I am inclined to assume this is a convention and not operator specific and therefore I would answer NO, ans B.
Q3. Tricky one as it doesn't specify the performance class. But inferring from the provided options it does not seem to relate to performance class A and so I would say Ans is B. Have a look at EU OPS.
Q4. Although I disagree from an airmanship and practical standpoint, within the context of the question MCT would be the correct answer. Ans B again!