A Researcher Has Collected Nationwide Data for the Age of Mothers

Multiple Choice

A researcher has collected nationwide data for the age of mothers at the time they give birth and the incidence of Down syndrome.What relationship between maternal age and Down syndrome is this researcher likely to find?

A) a very weak relationship
B) incidence of Down syndrome increases among those born to mothers who are older
C) incidence of Down syndrome decreases among those born to mothers who are older
D) incidence of Down syndrome increases among mothers under the age 35