When preparing a statement of cash flows using the indirect method, an increase in accounts receivable during the period would cause which one of the following adjustments to accrual based NI in determining cash flows from operating activities?

a. subtract the increase in accounts receivable from NI

b. add the increase in accounts receivable to NI

c. add the increase in accounts receivable to the financing activities

d. add the increase in accounts receivable to the investing activities