Answer:
d. having enough books to satisfy customer demands versus the cost of having the inventory
Explanation:
There are inventory issues in each business. This is because many a times the demand and supply of inventory cannot be estimated.
Thus, in the given case also, there is same issue.
The books are written by famous politicians or celebrities, thus there is assurance of sale, because of the popularity, celebrity concerns etc:
At the same time there is no assurance as to the volume of sale. As people might criticize the books or people might like the book, but it will be in popularity that is confirm, because of social status of the author.
In this case to keep the inventory cost low, and also stock of inventory to meet the needs of people at the same time is challenge.