Why does production eventually experience diminishing marginal returns to labor in the short​ run?
A. Since all factors of production are fixed in the short​ run, as more and more workers must share these fixed​ factors, the marginal product of each additional worker will eventually decrease.
B. Since all factors of production are fixed in the short​ run, as more and more workers must share these fixed​ factors, the marginal product of each additional worker will immediately decrease.
C. Since the skill level of labor​ (the amount of human​ capital) is fixed in the short​ run, as more and more physical capital is​ added, the marginal product of each additional worker will decrease.
D. Since at least one factor of production is fixed in the short​ run, as more and more workers must share the fixed​ factors, the marginal product of each additional worker will immediately decrease.
E. Since at least one factor of production is fixed in the short​ run, as more and more workers must share the fixed​ factors, the marginal product of each additional worker will eventually decrease.