The primary difference between the accrual basis and the cash basis of accounting is:

The correct answer is letter "A": The timing of when revenues and expenses are recorded.

Explanation:

The main difference between accrual basis and the cash basis of accounting is that with the accrual basis revenue is recognized when it is earned while expenses are recorded when they are invoiced, not necessarily paid. On the other hand, with the cash basis of accounting method, revenue and expenses are recorded when the transactions are realized.