An assembly line consists of 21 tasks grouped into 5

An assembly line consists of 21 tasks grouped into 5 workstations. The sum of the 21 task imes is 90 minutes. The largest assigned cycle ime is 20 minutes. What is the efficiency of this line? OA 17 percent OB. 42 percent OC. 90 percent O D. 85 percent OE 100 percent