As Part of a Database of New Births at a Hospital

As part of a database of new births at a hospital, some variables recorded are the age of the mother, the marital status of the mother (such as single, married, or divorced) , the weight of the baby, and the sex of the baby. Of these variables:

A) the individuals described are mothers and babies involved in births at a hospital.
B) the age of the mother and the weight of the baby are quantitative variables.
C) the sex of the baby and the marital status of the mother are categorical variables.
D) All of the answer options are correct.