Answer:
e. can be used in place of another good, fulfilling the same basic purpose
Step-by-step explanation:
Substitute goods are products used in place of another when it becomes unavailable or beyond cost and even for other reasons. Such products are however only recognized as substitute products where it fulfills the basic purpose as the other.
For example, a person may choose to make a trip by train rather than by bus. The basic purpose of the bus is to get the person to a desired destination and where the train is used in place of the bus to get the person to the desired destination.
As such, the train is a substitute to the bus.
Hence the right option is e. can be used in place of another good, fulfilling the same basic purpose