The value and cost of goods are easiest to determine when the goods are a. private goods. b. public goods. c. common resources. d. club goods.

Private goods.

Explanation:

Private goods are commodities bought by a consumer for personal consumption. It is very easy to determine the cost of private goods as the cost is the price at which it is sold in the market. On the other hand public goods are commodities that everyone enjoys in society that are not necessarily paid for by consumers. Therefore to determine the final cost of public goods is difficult to ascertain.

i think the answer to your question is b. directive