Answer:
d) All current customers who up to a certain point in time have NOT bought in the jewelry category but did buy jewelry in the next time frame
Explanation:
Cross-sell opportunities are employed by online and in-person marketers with the aim of convincing buyers to chose another product from a product category that they are interested in. For example, if the customer bought a necklace, the site might suggest that users who bought a necklace also bought a pendant. The aim of this suggestion is to convince the consumer to purchase an item that might be useful to him judging from the products he just indicated interest in.
Therefore, a good cross-sell model will identify customers who bought jewelry but not from a particular jewelry category.
