Q: Fact 1: Cells are programmed to divide only a set number of times. Fact 2: Cell division is by mitosis . Given the two facts above, what occurs a set number of times?

Possible answers:
1). evolution.
2). respiration.
3). waves.
4). mitosis.
5). photosynthesis.
6). relocation.
7). murmur.
8). fever.
A:
4).