Which of the following statements supports the author's claim that "conservation is a collective responsibility"?

a. the highest levels of conservation took place in the mid-to late 1970s when president carter was asking
citizens to be responsible for conserving resources.

b. these opposing values should raise a red flag about the consumer culture and its influence on youth.

c. this decline, interestingly, is coupled with a rise in materialistic values.

d. the steepest decline in conservation took place during reagan administration.

e. and when youths are more materially driven, they are also less likely to believe that natural resources will
become scarce in the future.