Provide an Appropriate Response

Provide an appropriate response.
-A U.S. government report stated that "With bank interest rates at 3.0%, 21% of wage earners believe it
Worthwhile to keep money in a savings account. However, at 5.0% interest, 27% of wage earners believe it
Worthwhile to keep money in a savings account. The margin of error for both studies is 4 percentage points."
The goal of the study

A) was to determine the effect of interest rates on the percentage of persons saving money.
B) was to prove that higher interest rates encourage more people to save money.
C) is not clear from the report of the study.
D) was to determine the effect of an interest rate increase from 3% to 5% on the percentage of persons saving money.