Repulsion because attraction can be the result of an induced charge. Repulsion occurs when there are 2 net charges.
Opposite charges attract (pull towards each other). Like charges repel (push away from each other).
This means that two positively charged things will repel each other and two negatively charged things will repel each other.
One positively charged thing and one negatively charged thing will attract each other.
Tip! Learn Electric Charge and Force: Definition, Repulsion & Attraction at Study.com.