The main trait of a single-period model is that: a. it has the largest EOQ sizes.
b. supply is limited. the cost of a shortage cannot be determined accurately.
c. the order quantity should usually equal the expected value of demand.
d. inventory has limited value after a certain period of time.

d. inventory has limited value after a certain period of time.

Explanation:

Under the single period model, the companies ordered bulk quantities at a one time when there is a seasoned demand also the taste and the preference of the consumers varies from time to time

Therefore in the given option, the option d is correct as it remains with the limited value after the specific period of time

So, the other options are wrong

it should be

government control and resources