The correct answer is D. Avoiding high-risk situations
A could lead to a possible sexual encounter. B would just lead to confrontation. C is just dumb and would lead to potentially putting yourself in harms way.
If you avoid high risk situations where the chances of a sexual encounter are high you are more than likely able to successfully remain abstinent.
The answer for what if you don't have anything on here.?
Both (animal) and human activities contribute to land pollution.
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Hope this helps you!
Every cell in your body has the same genes/DNA but, the gene expression process decides which genes are active in which cells which is how each cell type gets it properties.