HELPPPP NOWWWWWWWW 45 POINTTSSSS

When there is a need to show that there is more than one molecule of a compound, what should you do?

a.
Use a number called a subscript after the formula.

b.
Use a number called a coefficient after the formula.

c.
Use a number called a subscript before the formula.

d.
Use a number called a coefficient before the formula.