The correct answer is C) a higher rate than those earning less money.
In general, Americans with high-income vote at a higher rate than those earning less money.
Regarding data of the United States Census Bureau, in the Presidential election of 2018, 80% of adults from families that earned $100,000 a year, participated in the election, voted. On the other hand, only 52% of adults that earned $20,000 or less, voted. Among the factors that affect participation in elections are high level of education, a higher income, and white-collar workers.
The other options of the question were, a) the same rate as any other income group, b) lower rate than any other income group, and d) a lower rate than those earning less money.
