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."
(A) a smaller commitment to work and a career than their parents and grandparents
(B) less of a commitment to work and a career than their parents and grandparents
(C) a smaller commitment to work and a career than that of their parents and grandparents
(D) less of a commitment to work and a career than their parents and grandparents had
(E) a lessening of the commitment to work and a career that their parent and grandparents had
ellipsis can make 2 error.
1 ambiguity,
in the right part after "than", we do not know which entity of the two entities is compared
2. verb tense
verb is cut off in the part after "than", the verb in this part is the same as the verb in the part before "than". this can be illogical
a skill important to realize errors is to FOCUS ON THE VERB OF THE PART AFTER "THAN".
applying this skill, focus on the verb of the part after "than".
without a verb in the part after "than". the sentence could be either
they have smaller commitment to work than to their father
they have smaller commitment to work than their father have
this is one error.
second error is
if the entity compared is correct, the verb tense could be wrong.
we can infer the following
they have smaller commitment to work than their father HAVE.
this is still wrong HAVE should be "had".