Coulomb's Law Says That the Electrical Force Between Two Charged $q_1$

Multiple Choice

Coulomb's law says that the electrical force between two charged objects is directly proportional to the product of the quantity of charge on the objects and inversely proportional to the square of the distance between the objects.Let $q_1$ and $q_2$ be the charge on the two objects.Let d be the distance between the objects and F be the electrical force between them.Translate Coulomb's Law into mathematical symbols.

A) $F=\frac{q_{1} q_{2}}{d^{2}}$

B) $F=\frac{k d}{\left(q_{1}-q_{2}\right) ^{2}}$

C) $F=\frac{k\left(q_{2}-q_{1}\right) ^{2}}{d^{2}}$

D) $F=\frac{k q_{1} q_{2}}{d^{2}}$