The municipality decided to spray the area against flies only when their number increased to a disturbing extent.
A)If the municipality were quicker at spraying the area against flies , they wouldn't increase so disturbingly.
B)Flies can only be prevented from increasing to a significant extent by the diligent work of the municipality.
C)The municipality didn't try to prevent flies in that area before they reached a disturbing level.
D)When more and more flies disturbed the people in the area the public was forced by the municipality to spray.
E)Although a disturbing number of complaints have been made about the flies , the municipality hasn't done anything against them yet.