D and F are definitely the best choices. The reason is that the sentence requires a word that is similar to "affects" which means "to influence" or to "have an impact on." Trigger means to set in motion, or "to start" as if it had never happened before. "Affect" doesn't mean that it is just starting to happen. That is why trigger is wrong.
To "color" in this context means "to influence."This is quite similar to "affect." "Impact" is a good answer because this also means to have an influence on.
Let me know if you need more of an explanation.