D. because " was a lot of fun" is a prepositional phrase.
<span>After the war, the Nigerian government switched the currency from Biafran money to pounds.
This fact is important to understanding the piece because it helps the reader know the reason for the man to have to stand in line just to turn his money in for a type of money that he doesn't understand at all (which is shown by the fact they call it 'egg rashers'). </span>
