Suppose 40 Employee-Hours Can Produce 80 Units of Output

Suppose 40 employee-hours can produce 80 units of output.If the law of diminishing marginal returns is present,producing 160 units of output will require

A) an additional 40 employee-hours.
B) a total of 80 or less employee-hours.
C) less than 40 additional employee-hours.
D) a total of 81 or more employee-hours.
E) a total of 80 employee-hours.