According to United States Air Force officials, a cannon shooting dead chickens at airplanes has proved helpful to demonstrate what kind of damage can result when 3jets fly into a flock of large birds
(A) shooting dead chickens at airplanes has proved helpful to demonstrate
(B) shooting dead chickens at airplanes has proved itself helpful as a demonstration of
(C) shooting dead chickens at airplanes proves itself helpful as demonstrating
(D) that shoots dead chickens at airplanes proves itself helpful to demonstrate
(E) that shoots dead chickens at airplanes has proved helpful in demonstrating
I didn't find any error in A. Please help explain what is wrong with A. A says Shooting dead chickens( the act it self not the cannon itself has proved ...to demonstrate....) it think OA should be A ...
OA is E
(A) shooting dead chickens at airplanes has proved helpful to demonstrate
(B) shooting dead chickens at airplanes has proved itself helpful as a demonstration of
(C) shooting dead chickens at airplanes proves itself helpful as demonstrating
(D) that shoots dead chickens at airplanes proves itself helpful to demonstrate
(E) that shoots dead chickens at airplanes has proved helpful in demonstrating
I didn't find any error in A. Please help explain what is wrong with A. A says Shooting dead chickens( the act it self not the cannon itself has proved ...to demonstrate....) it think OA should be A ...
OA is E
