Option B
This is an overdraft
The overdraft enables the account renter to proceed to withdraw money still when the account has no capitals in it or has inadequate funds to reach the value of the withdrawal. An overdraft indicates that the bank allows clients to acquire a set measure of money.
There is interest on the loan, and there is typically a charge per overdraft. With an overdraft account, a bank is satisfying payments a client has executed that would unless be discarded, or in the fact of reality checks, would bounce and be passed without payment.