In a Series of 100 Women with Breast Cancer, 30

In a series of 100 women with breast cancer, 30 reported having a university education.From this we can conclude:

A) Belonging to a high social class increases the probability of developing breast cancer
B) University education is rarely associated with breast cancer
C) In this particular series of women with breast cancer, 30% had a university education
D) A, B and C are all true
E) None of the above statements is true