81) Refer to Figure 8-3. Each of the three SRATC curves shows A) technically inefficient methods of production, given that they lie above the LRAC. B) the lowest cost attainable, holding the plant size constant. C) optimal plant sizes in the long run. D) the output that is possible when all factors of production are fixed. E) the lowest cost attainable, given that the plant size is the largest it can possibly be