Consider the graph of U.S. House and Senate Reelection Rates, 1964-2018 in the tutorial. Which of the following statements does the data in the graph support? a.) The incumbency advantage is a minor factor in whether a person wins a congressional election. b.) The incumbency advantage is stronger in the House than in the Senate. c.) On average, about 60% of incumbents are reelected to the House and the Senate in each election. d.) The reelection rate of incumbents in both the House and the Senate has decreased over time