Concept:The expression "get under your skin" means to irritate, bother, or annoy someone deeply.
Explanation:In the sentence, the speaker advises someone not to allow others to affect them emotionally.
The phrase does not refer to a physical infection, being defeated in a contest, or being bullied.
Instead, it suggests that the person should not let others cause annoyance or frustration.
Thus, "Please don't let them get under your skin" means you should not let them make you irritated or upset.
Answer:D. annoy you.