I believe the answer is the second choice. "He was in one of his moods, for the day.." the first and third choices are definitely out, no doubt. And the fourth is the runner up. I'd have to say the second is the best choice. Key words are 'unprofitable' and 'unsatisfactory' followed by the notion that he wishes he could start over. This gives the impression that he was idle rather than ambitious.
What do you mean by diagram, I might be able to answer the question if I know what it means
Answer:
B. The number of people moving to San Francisco is rising.
Explanation:
The subject ‘the number’ is singular, so it should have a singular verb is.