In Terms of Assessing the Value of Satisfied Customers, Which

In terms of assessing the value of satisfied customers, which of the following statements is true?

A) High- level purchasers that are unsatisfied with a company will not refer customers, whereas unsatisfied low- level purchasers will still refer customers.
B) High- level purchasers are more likely than low- level purchasers to refer customers.
C) Low- level purchasers are more likely than high- level purchasers to refer customers.
D) Low- level purchasers can be equal to or more valuable than high- level purchasers because of their ability to refer valuable customers.
E) Low- level purchasers tend to refer low- level purchasers, while high- level purchasers tend to refer high- level purchasers.