In the given voting system, the weights represent, in order, voters A, B, C, and so on. Determine the Banzhaf power index for each voter.[16 : 1, 5, 7, 9]
A. A and B have an index of 0. C and D have an index of 
.
B. A has an index of 0. All others have an index of 
.
C. All have an index of 
.
D. A has an index of 
. All others have an index of 0.
Answer: A
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