Electromagnetic Force: A fundamental force in nature, the electromagnetic force acts between charged particles and is the combination of all electrical and magnetic forces. The electromagnetic force can be attractive or repulsive. So I would choose "strong, but weaker than the gravitational force"
If it is wrong, then I suggest going through and looking more carefully through what I just said, because honestly I had that same question once, and I chose that answer, and it was correct. So you should get it correct as well.
