What Is a Major Difference Between a Generation Y and a Generation

What is a major difference between a Generation Y and a Generation X consumer?

A) Generation Y is more alienated from traditional culture than Generation X and is reached with more cynical promotional themes.
B) There are so many more members of Generation X than Generation Y that promoters use more mass communications with the Gen Xers and fewer one-on-one promotions.
C) There are no basic differences except what would be expected by their age differences.
D) Proportionally, less tobacco and alcohol will be purchased and consumed by Generation Y members than the Generation X cohort.