In How to Kill a Mockingbird, Atticus warns them not to kill a mockingbird, because it doesn't harm anybody. Boo Radley could be considered the mockingbird, because although he is away by himself and harming nobody, the children mock and disturb him.
I think it might be C I am not 100% sure though
D.Mutation causing uncontrolled cell division
Explanation:
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If you walk in the rain, it will be much easier for the water droplets to penetrate your clothing, then running will make the rain slide off of you, so with running you will be less wet.