As a result of the continuing decline in the birth rate, less people will enter the labor force in the
1980’s than did in the 1960’s and 1970’s, a twenty year period during which people born after the war
swelled the ranks of workers.
(A) less people will enter the labor force in the 1980’s than
(B) less people will be entering the labor force in the 1980’s as
(C) fewer people will enter the labor force in the 1980’s as
(D) fewer people will be entering the labor force in the 1980’s as
(E) fewer people will enter the labor force in the 1980’s than
Answer is E, what is wrong in C??