Many People Believe That Parents' Marital Status Influences Their Child's

Many people believe that parents' marital status influences their child's development throughout life and has a large effect on their child's skill in sports.A survey was sent to 100 students who were in athletics in college.Responses from 35 students were received.The researchers were interested in determining whether the marital status and level of happiness of the students' parents would predict the student's self-rated skill level in a sport.What is the number of cases?

A) 100
B) 35
C) 4
D) None of the above