Ball A attracts B and repels C. Ball D attracts B and has no effect on E. A negatively charged rod attracts both A and E. What are the charges,if any,on each ball?

Answer 1

Sorry, ball E both has no charge and a positive charge. I can not make sense of this or I would have replied long ago. It is either as typo or an error or I am simply not understanding.
if the rod attracts E , E is +
B is - so D is + so D would repel E
Repel and no effect is a contradiction.

Answer 2

I made the question short so ill write the whole question maybe it might make sense to you.

1.Five styroform balls are suspended from insulating threads. Several experiements are performed on the balls and the following observations are made:

Answer 3

*Ball A attracts B and repels C
*Ball D attracts B and has no effect on E
*A negatively charged rod attracts both A and E.
What are the charges if any on each?