$[$paper$]$ A paper mill is trying to determine how much pulp they should be producing. The

problem is$,$ their pulp is used to make newspaper, cardboard, and even baby diapers. Their

newspaper customers report that their customers are buying fewer newspapers. But shipping

companies are reporting more of their consumers shipping packages. And babies keep soiling

their diapers. Which of the following concepts describes the difficulty the paper mill has in

forecasting their sales?

Price Elasticity

Direct Demand

Derived Demand

Seasonality

Demand Diversification