I'll try to help on this one, hopefully you see it before your exam time.
Focus on what the actual question asks, don't get wrapped up in the what if's/what it isn't asking.
What was the effect of exercising the stock options?
Use process of elimination.
A. Debt-to-equity ratio decreased to 12%. Without doing any calculations, this is the only answer that could fit. Debt remains constant, equity increases. Debt/Equity has to decrease. 100/100=1 100/200=.5
B. Earnings per share increased by $0.33. More stocks outstanding = lower earnings per share.
C. Asset turnover increased to 5.4%. Asset turnover would decrease as assets increased when cash received from options. (I originally thought this would not change due to stock options but upon further review of the formula net sales/avg assets.)
D. No ratios were affected. Incorrect as ratios are always effected when more stock is issued or options are exercised. This is one of the reasons we have DEPS vs basic EPS.