Which sentence, if placed between sentences 3 and 4 would most improve the
clarity of paragraph?
A. In instant runoff voting, voters identify not only a first candidate,
but also their second-place choice.
B. It would be difficult to change the voting system in America
because the electoral college has been in place for so long.
C. There is a movement to use instant runoff voting in the United
States to make voting fairer.
D. Countries using instant runoff voting include Australia and some
European nations.