21) Which of the following is an example of an investing activity? A) Purchasing supplies to be consumer this period. B) Issuing shares of common stock for cash. C) Selling merchandise to customers on account D) Purchasing an office building. 211) If total assets increased by $200000 and stockholders' equity decreased by $90000 during a period of time, then total liabilities must change by what amount and direction during that same period? A) $290000 increase B) $110000 increase C) $290000 decrease D) $110000 decrease