Which of the following is true concerning the statement of cash flows? PLEASE EXPLAIN WHY!!!!

a. When pension expense exceeds cash funding, the difference is deducted from investing activities on the statement of cash flows.

b. The FASB requires companies to classify all income taxes paid as operating cash outflows.

c. Under GAAP, the purchase of land by issuing stock will be shown as a cash outflow under investing activities and a cash inflow under financing activities.

d. All of these are true concerning the statement of cash flows.