What will MOST LIKELY happen to the electrons when the rod touches the foam cup?

A. 
The electrons will pass to the foam cup but will remain in a localized, positively charged area on the cup where the rod was placed.

B. 
The electrons will pass to the foam cup but will remain in a localized, negatively charged area on the cup where the rod was placed.

C. 
The electrons will pass from the foam cup to the aluminum can, and both the foam cup and the aluminum can will become positively charged.

D. 
The electrons will pass from the foam cup to the aluminum can, and both the foam cup and the aluminum can will become negatively charged.

A. The electrons will pass to the foam cup but will remain in a localized, positively charged area on the cup where the rod was placed.