02.24: Two small hollow metal spheres hung on insula
n 8o:((u85b budg ygl3bm1zrtting threads attract one another as
bu(tb1gn ro8dg3ym5lz ub 8(: shown. 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?