Assuming “prod” is the variable name handling the product, what code can the Developer use to access it?

A Digital Developer extends a system object, Product, and adds a Boolean attribute, “sellable,” to it.

Assuming “prod” is the variable name handling the product, what code can the Developer use to access it?
A . prod.extended.sellable
B . prod.sellable
C . prod.persistable.sellable
D . prod.custom.sellable

Answer: D