The first one is dramatic irony<span />
The only ones that apply are:
The FCC created the doctrine to make sure that broadcast networks met their obligation to the public by giving time to viewpoints other than their own and those they agreed with.
The FCC created the doctrine to keep broadcast media from being too one-sided and assure that all viewpoints received equal opportunity in the media.
The Fairness Doctrine (1949–1987) is a policy developed by the FCC (Federal Communications Commission) which required licensed radio and television broadcasters to cover controversial issues of interest to their communities, including by devoting equal airtime to opposing points of view.
<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>