Answer:
D. Any of the above, depending on the transactions​
Step-by-step explanation:
The double entry principle simply means that any accounting transaction has two records: one credit, and one debit, and it depends on the nature of the transaction, and of the accounts involved which specific value is credited and which one is debited.
For example, if a firm purchases 100$ of office supplies with cash, the credited account is cash, because cash is reduced by $100, while the office supplies account is debited by the same value.
If a firm sells 100$ of office supplies instead, the office supplies inventory is credited for this value, while the same amount of cash is debited for this same amount.