Answer:
The correct answer is loanable funds; right; increase.
Explanation:
An investment tax credit reduces the tax bill for any firm that purchases new capital for further investment.
If the government expands the investment credit and starts giving higher tax breaks to those firms that decide to invest, it will promote firms to increase investment.
This will further lead to an increase in the demand for loanable funds. As a result, the demand curve for loanable funds shifts to the right. This further causes the interest rate to increase.