$(8$ pts$)$ In each case shown below, three different charges are brought close to $($but not touching$)$ three different materials.

Case $1$

Case $3$

conductor

conductor

Which of the following statements about the force between the charges and the materials is TRUE?

A$.$ It will be attractive in case $3,$ repulsive in case $1,$ and zero in case $2.$

B$.$ It will be attractive in all three cases.

C$.$ It will be attractive in cases $1$ and $2$ and repulsive in case $3.$

D$.$ It will be attractive in case $2$ and zero in cases $1$ and $3.$

E$.$ It will be attractive in case $1,$ repulsive in case $2,$ and zero in case $1.$