Find all specified roots.Fourth roots of -16
A. 
+ 
i, 
- 
i, - 
+ 
i, - 
- 
i
B. 2 + i, 2 - i, -2 + i, -2 - i
C. 1 + i, 1 - i, -1 + i, -1 - i
D. 8
+ 8
i, 8
- 8
i, -8
+ 8
i, -8
- 8
i
Answer: A
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