Given a short-run scenario, explain why marginal physical product would diminish as more waiters are hired in a restaurant.

Select one:

a.

Over time workers will need more training.

b.

Compensating wage differentials between waiters.

c.

A strong union (the Hotel Employees and Restaurant Employees Union)

d.

The availability of land and capital is limited by prior investment decisions.

e.

Some factor inputs are fixed in the long-run.