Answer:
Option D,debit rent expense, $540; credit cash $540
Step-by-step explanation:
To start with, it is important to note that the check of $600 has correct posting in the bank account,hence that requires no adjustment.
However, on the cash book side, a lesser amount has been credited as outflow of cash to the tune of $540($600-$60),hence the correct entry would be record the balancing cash flow by crediting cash book and debiting the rent expense account,hence option D appropriately captured that correct entry.