**A** which receives the electric force from a fixed point charge $B$ which is positively charged. The distances between **B** and the two points **p** and **q** are $2d$ and $d,$ respectively. Which of the following statements is correct?

a) The point charge **A** is negatively charged.

b) The electric potential exerted by the point charge **B** at the point **p** is higher than that at the point **q**.

c) The magnitude of the electrostatic force acting on the point charge **B** at the point **p** is greater than that at the point **q**.