Educator: Environmental factors clearly have little effect on whether a teenager will participate in sports. Family life is probably the strongest environmental factor, yet it is common for one teenager in a family to participate in sports enthusiastically while other teenagers in the family are indifferent to sport. Moreover, school programs designed to encourage inactive teenagers to participate in sports arc generally ineffective.
Which one of the following, if true, most seriously weakens the educator's argument?
(A) Athletic ability varies, even among siblings, and teenagers who have demonstrable athletic ability arc more likely than those who do not to participate in sports. - WRONG. Gives a reason why some participate while don't. But eventually doesn't tell why environmental factors aren't responsible for non participation.
(B)
Some teenagers, even those in schools that do not have any sports programs, are
more enthusiastic about participating in sports than their parents - WRONG. Ringing wrong bells.
(C)
Adults' enthusiasm for participating in sports generally is directly proportional to the extent to which they participated in sports when they Were younger. - WRONG. Scope shift.
(D) The proportion of teenagers who participate in sports varies greatly from society to society and from decade to decade. - CORRECT. Though I rejected originally while attempting but on introspection it's a better choice than A. Gives a reason why there may be another reason behind non participation.
(E)
School programs designed to encourage inactive teenagers to participate in sports
widely vary in success, with only a few being highly successful. - WRONG. Not about whether the programs are successful or not. It's about whether environmental factors affects participation.
Answer D.