Which of the Following Is True Regarding Mass Relationships in a Chemical

Which of the following is true regarding mass relationships in a chemical reaction?

A) To determine mass relationships in a chemical reaction, you first need to know the balanced chemical equation for the reaction.
B) To convert from grams to moles and vice versa, you need to use Avogadro's number as a conversion factor.
C) To determine mass relationships in a chemical reaction, you first need to know the balanced chemical equation for the reaction, and to convert from grams to moles and vice versa, you need to use Avogadro's number as a conversion factor.
D) None of these are true.