Answer:
Answer is option D, i.e. take the buyer to the bank to get a cashier's check.
Step-by-step explanation:
Compared to personal checks, cashier check is considered the more authentic and safer mode of transaction in case of loan fund closing. In the case above, there is still one hour left for the due time of closing fund. Thus, if the buyer has not issued the cashier's check, then he must be guided to do so as it is the most appropriate check used in closing funds.