02.24: Two small hollow meta
om /w3g;j82el w hbhq+qem- :cl spheres hung on insulating threads attract one another as
;jq2hhwe/e3 -:b o8cgq+ lmm wshown. It is known that a positively charged rod will attract ball A.
I. Ball A has a positive charge
II. Ball B has a negative charge
III. Ball A and Ball B have opposite charges
Which of the above can be correctly concluded about the charge on the balls?