​Among the Lessons Learned Since Primaries Became the Predominant Method

​Among the lessons learned since primaries became the predominant method of choosing presidential candidates,one is ______________.

A) ​Iowa and New Hampshire have been emphasized by the media far out of proportion to their actual importance to the process.
B) ​incumbent presidents now face more opposition than under the older system.
C) ​that candidates have become more reliant on support of their national parties.
D) ​the Iowa caucuses and the New Hampshire primary do matter.
E) ​primaries are subject to more charges of electoral irregularities than the convention system that preceded primaries.