It increases metabolic rate
The answer to your question is “An action plan”
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Exposure to Teratogen can cause defects if a foetus is exposed to it. There are several kinds of teratogens that can range (as mentioned in the question) from a chemical to a virus or radiations. Teratogen is the term used for any such agent that can result in harming the unborn baby due to exposure to it.
I think it would be B or C considering if you don’t smoke (amongst other things) you have less of a chance to get lung cancer, but also if you don’t spent to much time in the sun with out protection and take care of your skin then you probably won’t get skin cancer so C is actually the most likely answer