A, B, and D begin statements that can stand by themselves logically. C begins a statement that shows how the previous statement and itself are connected. As such, the answer is C(As a result).
There is a number of words or phrases that you could use to help smooth the transition between sentence 1 and sentence 2, and here are some of them: also, in addition, additionally, furthermore, moreover, on top of that, etc. The meaning of the second sentence adds on top of the first one - so any of these transition words would be a good choice.
Those are pretty good settings! Don’t worry about it being too basic, the setting won’t matter a whole lot as long as your storyline is good. Another idea for the setting could be at a school, as well. Just decide what your storyline will be and you can decide the setting based on plot. Hope this helps and good luck!
i believe the answer is
a) greasy and soapy
unctuous: (chiefly of minerals) having a greasy or soapy feel
