Why is it dangerous to target a generation as if it were a single target market?

Select one:

a$.$ Each member of the Generation is likely to lose customer lifetime value

b$.$ As people age, they shift from one generation to the next, so the members of the generation are not consistent

c$.$ Generational marketing is only effective when a concentrated targeting strategy is used

d$.$ The probability is high that money will be wasted on people who are not legitimate members of the target market