Answer:
Option (b) is correct.
Explanation:
When the united states offered a tax credit to the firms that built the new factories then this will increase the demand for loanable funds because every firm wants to built a new factory, so that they are eligible for the tax credit given by the U.S.
This increase in the demand for loanable funds at the ongoing interest rate would shift the demand curve of loanable funds rightwards and this economy is experiencing a situation where the demand of loanable funds is greater than the supply. This will create a shortage of loanable funds.