Beat The GMAT a GMAT & MBA community

The local agricultural official gave the fruit growers
of the District 10 Farmers' Cooperative a new
pesticide that they applied for a period of three.years
in their pear orchards in place of the pesticide they
had formerly applied' During those three years, the
Proportion of pears lost to insects was significantly
iess-than it had been during the previous three-year
period. On the basis of these results, the official
concluded that the new pesticide was more effective
than the old pesticide, at least in the short term, in
limiting the loss of certain fruit to insects'
The official's conclusion is most strongly supported
if which one of the following groups of trees did not
show a reduction in losses of fruit to insects?
(A) peach trees grown in the district that were
treated with the new pesticide instead of the
old Pesticide
(B) peach trees grown in the district that were
treated with the new pesticide in addition to
the old Pesticide
(C) Pear trees grown in the district those were
treated with the old pesticide instead of the
new pesticide
(D) pear trees grown in a neighboring district that
were treated with neither the old nor the new
pesticide
(E) pear trees grown in the district that
-were
treated with the new pesticide instead of
the old Pesticide