Answer:
A. Skills
Explanation:
However, nutrition seems most important all around, skills seems to fit into more of what is being said in the question.
It is D, sharing appreciation for what is being said. Both A and B aren't crucial to being a good listener, in fact in practice they effectively draw attention to yourself, which would be fine if the question was regarding being a good conversationalist. Additionally, C is just completely irrelevant, that wouldn't even be a good conversation practice, let alone a trait important to listening.
Answer:
14: A, eustress
15: B, recognize what your stressors are
16: D, PTSD (post traumatic stress disorder)
17: B, denial
18: C, denial and isolation
Hope this helps :)
It usually means you have gingivitis (gum disease)