Which among the points are considered efficient combinations? Quantity of Computers Produced 3,000 F 2,200 2,000 Production possibilities 1,000 -.. .mass frontier E 300 600 700 1,000 Quantity of Cars Produced Select one or more: A. D, C, E, and F B. A, B, E, and F C. C, F, B, and D D. E, C, D, and F