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.

C) 25.1%

Explanation:

Return on Equity(ROE): It is a profitability ratio calculated to show how much company has profited from the investment of the shareholders.

Net Income: $2,513 M

Shareholder's Equity: $9,996 M

ans.

heterothermic organisms include those organisms that can switch between homeothermic (having body temperature higher than environment) and poikilothermic (having variation in internal body temperature) strategies.

some migratory birds show heterothermy as they decrease their metabolic rate during cold nights to keep their body temperature low. drop in metabolic rate allows increase in production efficiency of birds that reduces the internal body temperature to make it equal to external cold temperature during cold nights.

thus, the correct answer is 'birds allow their temperature drop in order to increase their production efficiency.'