why is question 9 (B) instead of (A)

9) Partin Corporation's cash and cash equivalents consist of cash and marketable securities. Last year the company's cash account increased by $31,000 and its marketable securities account decreased by $22,000. Net cash provided by (used in) operating activities was $108,000. Net cash provided by (used in) financing activities was $(70,000). Based on this information, the net cash provided by (used in) investing activities on the statement of cash flows was: A) $9,000 OP=108,000108FIN=(70,0003870INVE=? B) ($29,000) e) $38,000 D) ($38,000) INV=LOG6TERMASSERS31,00022,000=9,00049,000+70,000=108,000 10) Majorn Auto Parts Store had net income of $81,000 for the vear just ended 49,000+70,000=