Which u.s. vice president was nicknamed cactus jack?

The correct answer is a. It will lend money to a bank in a financial emergency.

Explanation:

At certain point, the banks can be affected by “liquid crisis”, this means, even when they have resources, they don’t have enough cash to pay the demand from the investors. The role of lender of last resort, like the federa reserve,  is played by central banks, which can lend additional funds to banks by taking their assets as collateral.