Hey there! So diction basically means what words that the author uses. If they use certain words together, it can create the mood, which in this case is unease. An example might be using words like, "dark", "shadow", "creaking", "silence", or "creepy" in a horror/ scary story. When used together in the story, it can create the mood that something bad migjt happen. The author choses these words carefully to fit the passage. In otherwords, he would not use happy words if writing a horror story.
On a student it pay cause them not to have a consistent adult hood. for example, it may lead to a low paying job. If a student doesn’t go to college it can affect the people around them by having them second guess themselves on their decision to going to college. Society is already bad as it is with people not going to college there will be way more homeless people which would make society paranoid. the little things matter!
I believe that the answer is C.
Hope that helps!!!