A company's total cost, in millions of dollars, is given by C(t) = 260 -70e " where t= time in years. Find the marginal cost when t= 5. Round to the nearest hundredth. O A. 2.36 million dollars per year O B. 0.87 million dollars per year O C. 0.47 million dollars per year O D. 1.75 million dollars per year