Final answer:
A decrease in inventory should be added to accrual-based net income when using the indirect method for cash flow calculation because it signfies less cash was spent than reported on an accrual basis.
Step-by-step explanation:
When using the indirect method for reporting cash flows from operations, a decrease in inventory should be added to accrual-based net income. This is because a decrease in inventory indicates that less cash was spent purchasing inventory than what was reflected in the accrual-based net income. In accrual accounting, expenses are recorded when incurred, not necessarily when cash changes hands. Thus, to adjust net income to a cash basis, the decrease in inventory signifies that the company had a cash inflow (or less outflow) which wasn't captured in its net income calculation.
Therefore, the correct answer to the question is A) Added to.