Employment costs rose 2.8 percent in the 12 months that ended in September, slightly less than they did in the year that ended in the previous quarter. 


A. less than they did 

B. less than it did 

C. less than they were 

D. lower than 

E. lower than they were


Employment costs rose 2.8 percent in the 12 months that ended in September, slightly less than they did in the year that ended in the previous quarter.


A. less than they did Correct answer - no apparent errors.


B. less than it did Incorrect usage of singular "it" to refer to plural "costs". Eliminate.


C. less than they were "were" refers to a state of being, whereas this sentence talks about a state of change, "rose". Incorrect comparison. Eliminate.


D. lower than Incorrect comparison and parallelism - verb "rose" is being compared to something "in the year...", what that something is is not mentioned at all. Eliminate.


E. lower than they were Same error as in (C). Eliminate.