Which statement regarding social forces is most accurate?

A$.$ Changes in social forces can have a dramatic impact on marketing strategy.

B$.$ As a social force, consumer incomes have more impact on marketing strategy than demographics.

C$.$ Social forces within an organization motivate employees to improve their productivity.

D$.$ Social forces determine all of the other environmental forces that affect an organization.

E$.$ Of all the environmental forces, social forces are the easiest for a marketer to manipulate.