$A$ point charge $q_1$ exerts an electric force on a second point charge $q_2$. If a third charge $q_3$ is brought near,the electric force of $q_1$ exerted on $q_2$:

• A
  Decreases
• B
  Increases
• C
  Remains unchanged
• D
  Increases if $q_3$ is of same sign as $q_1$ and decreases if $q_3$ is of opposite sign