why is it B instead of A?

delete this answer please

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=108,000 FIN=(70,0003870 INVE =? B) ($29,000) e) $38,000 D) ($38,000) INV=LOEWTERMASSETS=31,0009,00022,00049,000+70,000=108,000