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130.
At least two of the charged spheres to the right are negatively charged.  Which sphere, if any, could be positively charged?
A. sphere A Like charges repel and unlike charges attract.

Since all the spheres are repelled from each other, all the spheres have the same charge.

All of the spheres are negatively charged.

The Correct Answer is D.
B. sphere B
C. sphere C
D. no sphere