O f$.$ B and C

As presented in the chapter, with the passage of time

a$.$ priorities and values evolve $-$ what is greatly valued by one generation may have limited appeal to the next generation.

b$.$ priorities and values are remarkably consistent.

c$.$ the older generations lived through times when today's newest obsessions didn't exist and they might just convince younger people that life was better without many of the new things.

d$.$ A and B

e$.$ A and C