According to Coulomb's Law, the amount of electric force between two charged particles depends on:
A) the size of the charge on each of the two particles and the distance between them.
Coulomb's Law states that the force \( F \) between two point charges is directly proportional to the product of the magnitudes of the charges \( q_1 \) and \( q_2 \) and inversely proportional to the square of the distance \( r \) between them:
\[ F = k \frac{|q_1 q_2|}{r^2} \]
where \( k \) is the Coulomb's constant. Thus, option A is correct.