Answer:
Maybe you have some sort of allergy. This isn't always the case, maybe you got water up your nose and its coming back out, or maybe you have fluids that need to leave your body. Or just maybe you're sick. In which case wear a mask when going outside.
Explanation:
Question 1: a
Question 2: a
Answer:
is this question from some kind of story or are you asking randomly
I'd say it is D, but I'm not 100% sure. I'd wait to see if anyone else thinks so too.