The answer is C.
The sentence is a run-on as it shows 2 different subjects, the dog. and the cat.
(problem) I can't find my pen
(solution) ask someone to lend you one or retrace your day and look around for it.
I'm not sure if I answered this right but I tried
To be uncomfortable with something?
Answer:
C. Irrelevant, because it is an opinion and not a fact, and many people might disagree.
Explanation:
I would love to help answer this but there isn’t enough information to do so!