Which of the following statements about the marketing environment is false?

a$.$ Marketing environment forces are uncontrollable, so marketers do not plan for them.

b$.$ Marketing environmental forces often shape a marketer's decisions and actions.

c$.$ Marketing environment forces can fluctuate quickly and dramatically.

d$.$ The marketing environment influences customers by affecting their lifestyles, standards of living, and preferences and needs for products.

e$.$ The marketing mix variables are easier to control than the marketing environment.