gave her hair a neutral charge removed protons from her hair gave her hair a negative charge removed electrons from her hair
I gave my students this multiple choice question: A student removed a wool hat from her head. Her hair stood up from static electricity. What did her hat do to cause this?

Only one answer is correct among these 4 choices:
- gave her hair a neutral charge
- removed protons from her hair
- gave her hair a negative charge
- removed electrons from her hair

Could you tell me which one is correct?

removed electrons from her hair