Answer:
D). more likely to be affluent
Step-by-step explanation:
The voters in a presidential primary elections are more likely to be wealthy or rich than the voters in a general election.
Because presidential primary elections requires huge wealth and expenditures for campaigning and meetings and placards, etc.
In presidential primary elections, many people are involve in the election process and they influence the election a lot.
Thus the answer is
D). more likely to be affluent