Answer:
Let's begin by explaining the following:
The magnitude of any number (a charge in this particular case) is the distance this number has from 0 on the number line.
Now, since according physics<u> a distance can never be negative</u>, the magnitude of a number will always be positive. This means the magnitude of these given charges will always be positive, no matter if they are negative, positive or neutral.
Having this clarified, let's answer:
Element A has a charge of +5 and its magnitude is +5
Element B has a charge of -3 and its magnitude is +3
Element C has a charge of 10 and its magnitude is +10
