Which Group of Canadian Mothers Is MOST Likely to Use

Which group of Canadian mothers is MOST likely to use alcohol when they are pregnant?

A) mothers under the age of 21 and of lower-than-average income
B) mothers who are between the ages of 21 and 29 and have lower-than-average income
C) mothers who are between the ages of 30 and 39 and have above-average income
D) mothers who are between the ages of 30 and 39 and have below-average income