Since the 1960s, the level of turnout in presidential elections has averaged about percent. 45 60 75 65 35

According to statistics, the voter turnout from 1960 to 2018 has been about 60%. It actually peaked in 1960 in that time period at 63% and dipped in the mid 50% after the '72 election. The lowest point in the timeframe was in '96 when only about 50% turned out to vote. 

Ibelieve the answer is c