Municipal officials originally estimated that it would be six months before municipal road crews could complete repaving a stretch of road.
The officials presumed that private contractors could not finish any sooner.
However, when the job was assigned to a private contractor, it was completed in just 28 days.

Which one of the following, if true, does most to resolve the discrepancy between the time estimated for completion of the repaving job and the actual time taken by the private contractor?

(A) Road repaving work can only be done in the summer months of June, July and August.
- Not important. Does not explain why company took just 28 days to complete, ahead of schedule

(B) The labor union contract for road crews employed by both municipal agencies and private contractors stipulates that employees can work only eight hours a day, five day a week, before being paid overtime.
- still does not explain why there is a difference between 6 months and 28 days

(C) Many road-crew workers for private contractors have previously worked for municipal road crews and vice versa.
- Out of scope

(D) Private contractors typically assign 25 workers to each road-repaving job site whereas the number assigned to municipal road crews is usually 30.
- In that case, municipal road crews should complete the work faster

(E) Municipal agencies must conduct a lengthy bidding process to procure supplies after repaving work is ordered and before they can actually start work, whereas private contractors can obtain supplies readily as needed.
- This does most to explain the time difference. Before work actually starts, there is a lenthy process of bidding for supply procurement . This cuould be the reason why the officials gave a longer estimate for the date of completion.

E it is.

easy E

ywilfred, thanks

OA is E