1.Although it was expected that workers under forty would show hostility to the plan, the research report indicates that both younger and the older people approve of governmental appropriations for Social Security.
(A) younger and the older people
(B) younger people and the older
(C) the younger and the older people
(D) younger and older people(D)
(E) people who are younger and those who are older
I encountered the exact same problem in Princeton GMAT verbal review and their official explaination is that although both C and D are grammartically correct, GMAT rewards "simple and sweet", since it's about "people" in "workers" in general, it's not necessary to say "the young people" and "the older people", therefore D is more concise.