(i) How does the shape of the wind turbine blade help to produce energy?
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A) Uneven blades cause the wind to pass over unevenly, causing it to turn.
B) Even blades cause the wind to pass over unevenly, causing it to turn.
A
B
C
D
C) The material of the blade causes the wind to pass over unevenly, causing it to turn.
D) The material of the blade causes the wind to pass over evenly, causing it to turn.