There is a widespread belief in the United States and Western Europe that young people have
a smaller commitment to work and a career than their parents and grandparents and that the source of the change lies in the collapse of the "work ethic."
Meaning Analysis: in the US and Western EU there is a common belief. This belief is that young people currently have less of a commitment towards work and career than their parents and grandparents did. They blame this commitment issue to the diminishing "work ethic"
Error Analysis: (1) Sentence structure - Commitment is not countable. We say "less commitment" and not "small commitment"
(2) Comparison error - We are comparing the current commitment that young people have to the commitment that their parents and grandparents had in the past
(A)
Incorrect for the reasons mentioned above.
(B) less of a commitment to work and a career than
their parents and grandparents.
Incorrect. There is ambiguity as to what we are comparing out here. One could read this sentence in two ways
(1) Young people have less of a commitment to work and a career than to their parents and grandparents
(2) Young people have less of a commitment to work and a career than their parents and grandparents did
(C)
a smaller commitment to work and a career than
that of their parents and grandparents.
Incorrect. This choice repeats error (1) of choice (A). We also have a comparison error out here. This sentence is essentially saying that
"Young people have less of a commitment to work and a career than [i]to the commitment of their parents and grandparents" [/i] illogical
(D) less of a commitment to work and a career than their parents and grandparents had.
Correct Note - we could also use "did" out here.
E)
a lessening of the commitment to work and a career that their parent and grandparents had.
Incorrect. "a lessening" is unidiomatic
Correct Choice:
(D)