Answer:
The interest rate would be unaffected.
Explanation:
Option A, “Interest rate would be unaffected” is correct because, in a market for loanable funds, the government has decreased the tax rate on the amount of interest. At the same time, this will increase the interest-earning of consumers however the interest rate on the money will be unaffected. The intervention made by the government resulted in an increase in interest-earning. Moreover, a reduction in the tax rate will induce people to save more in order to earn more interest.