The 2016 balance sheet of E. I. du Pont de Nemours and Company shows average DuPont shareholders’ equity attributable to controlling interest of $9,996 million, net operating profit after tax of $2,308 million, net income attributable to DuPont of $2,513 million, and common shares issued of 950.044 million. Assume the company has no preferred shares issued. DuPont's return on equity (ROE) for the year is: A. 30.7% B. 37.6% C. 25.1% D. 36.4% E. There is not enough information to calculate the ratio.

As the inventor of hypertension medication, onesure pharmaceuticals (osp) inc. was able to reap the benefits of economies of scale due to a large consumer demand for the drug. even when competitors later developed similar drugs after the expiry of osp's patents, regular users did not want to switch because they were concerned about possible side effects. which of the following benefits does this scenario best illustrate? a. first-mover advantages b. social benefits c. network externalities d. fringe benefits