In general, diminishing returns occur:
a. as output expands in the early part of production.
b. as output expands at higher levels of output.
c. through the entire range of production.
d. when marginal product is rising.
a. as output expands in the early part of production.
b. as output expands at higher levels of output.
c. through the entire range of production.
d. when marginal product is rising.