D) "'It was worth at most only five hundred francs!'"
The way it is said with an exclamation point is they are surprised that it is worth that much.
One subject, one verb -- simple sentence
2 or more simple sentences, put together with a semi-colon or comma or conjunction -- compound sentence
one independent clause, one or more dependent clauses -- complex sentence
2 or more independent clauses and 1 or more dependent ones -- compound-complex sentences
Assuming that you're referring to the excerpt about a woman who was criticized because she's not quitting her job because she got a baby
She felt that the man is simple minded and simply not intelligent enough understand that she need the job to pay the bills, so rather than responding verbally, she chose to display her retort in other ways
hope this helps