In the long run, a profit maximising firm produces any given level of output by choosing the production method that A Shows a flat total cost curve. B Produces that output at the lowest possible cost....

In the long run, a profit maximising firm produces any given level of output by choosing the production method that
A Shows a flat total cost curve.
B Produces that output at the lowest possible cost.
C Maximises the marginal product of all factors.
D Maximises the marginal product of labour.
E Minimizes labour input.