Answer:
D
Step-by-step explanation:
It wasn't campaign financing. Money was not on anyone's mind until Clinton came along and made it an issue.
Defense spending was in the same category. People still believed what President Johnson (LBJ) said about guns and butter.
It wasn't gun control. The 2nd amendment had not quite become an issue.
Education Reform is your closest answer. Pat Buchanan made quite an issue about the need to stop Private Schools from being picked on. Education is closer to cultural reform than any of the others.