C: 2,030,000 KHR
D: 1,430,000 KHR
At 30th September 20X7, Zed Ltd had an allowance for irrecoverable debts of 37,000,000 KHR. During the year ended 30th September 20X8, the company wrote off debts totaling 18,000,000 KHR, and at the end of the year, it is decided that the allowance for irrecoverable debts should be 20,000,000 KHR. What is the total expense for bad and doubtful for the year ended 30th September 20X8?
A: 35,000,000 debit
B: 1,000,000 debit
C: 38,000,000 debit
D: 1,000,000 credit