Satatic Electricity - Mission SE2 Detailed Help

Two balloons, X and Y are placed near each other and subsequently repel each other. If balloon X is negatively charged, then Y MUST be (OR MUST NOT be) ___.

Charge Interactions
Charged objects show a noticeable interaction with other surrounding objects. The cause of the interaction can be summarized by one of the following three statements:
  • Oppositely charged objects attract each other.
  • Like-charged objects repel each other.
  • Any charged object - whether positive or negative - will attract a neutral object.