d.
a compound sentence is when the sentence can be split up to make two complete sentences.
i.e. Paolo missed his girlfriend. He knew she'd be back.
d. can be split up into two fully functional sentences.
A so it follows the story (but i guess you could also use B at the same time)
D. <em>uncharitable</em>.
The suffix <em>-able</em>, borrowed from Old French and originally from the Latin <em>-ābilis</em> (meaning "worthy of being acted upon"), can have different meanings.
The most common one is "fit/liable to be (done)," as in:
- <em>likeable</em> - fit to be liked
- <em>washable</em> - fit to be washed
- <em>degradable</em> - liable to be degraded.
This, however, does not apply to <em>comfortable</em>. Another meaning of <em>-able</em>, however, is "giving, or inclined to," as in:
- <em>comfortable</em> - giving comfort
- <em>(un)charitable</em> - (not) inclined to charity.
I would say that it is false that the sentence uses the proper pronoun. We don't know whether the crew member is a man or a woman, which is why you cannot use <em>him </em>here. You should say - them. If we knew it was a man, then <em>him </em>would be fine.