No.1 is not it
No.2 is not it.
No 3 is correct (a tick)
No.4 is wrong (it should be Mansa Musa, who ruled Mali in the early 1300s, was rich and powerful)
No.4 is correct (a tick)
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.
Think exactly, think logically