Object Y carries a net negative charge after being rubbed by fur. Cassie holds onto one end of object Y and brings the other end of object Y near some scraps of paper, which become attracted to it. Cassie is electrically grounded.

Which of the following statements is true?
A.
Object Y gained protons from the fur.
B.
Object Y is a conductor.
C.
Object Y is an insulator.
D.
Object Y gained protons from the paper.