For the year ended December 31, 2013, a corporation had cash flow from operating activities of $100,000, cash flow from investment activities of $40,000, and cash flow from financing activities of $10,000. If the beginning cash and marketable securities balance is $30,000, the Statement of Cash Flows for 2010 would show a

A. net decrease of $30,000 in cash and marketable securities

B. net decrease of $50,000 in cash and marketable securities

C. net increase of $30,000 in cash and marketable securities

D. net increase of $50,000 in cash and marketable securities