C) How will the allele frequency change in the rat population?

It could change in many ways,

Explanation:

as genetic mutations have many stimulants and triggers, for a precise answer you need  region, species and  predators /prey including weather and life conditions to specify mutations path.

1. b.

2. d.

3. a.

5. d.

6. c.

these are the only ones that i know, i hope this , and good luck.