Answer:
The answer is: Yes, an exchange was made.
Explanation:
In marketing, an exchange happens every time two or more entities (people. organizations or businesses) trade products or services. Each trade should result in a utility created for each party involved. In other words, what you get in exchange is worth more (at least for you) than what you give.
In Amanda's case, an exchange is made because she donated blood and received a feeling of satisfaction and happiness in exchange.
