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BTGmoderatorAT
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Supercell, a continuously rotating updraft deep within a thunderstorm, is not visible in all thunderstorms because they require very high wind velocity and moisture.
A) because they require
B) because they will require
C) because it will require
D) because it requires
E) because of requiring
I'm confused between options C and D? Can any experts help?
A) because they require
B) because they will require
C) because it will require
D) because it requires
E) because of requiring
I'm confused between options C and D? Can any experts help?












