Furis Corporation's Cash and Cash Equivalents Consist of Cash and Marketable

Furis Corporation's cash and cash equivalents consist of cash and marketable securities. Last year the company's cash account decreased by $12,000 and its marketable securities account increased by $19,000. Cash provided by operating activities was $18,000. Net cash used in financing activities was $12,000. Based on this information, the net cash flow from investing activities on the statement of cash flows was:

A) a net $12,000 decrease.
B) a net $1,000 increase.
C) a net $6,000 decrease.
D) a net $6,000 increase.