Breast-Fed Babies Have Been Shown to Have a Lower Rate

Breast-fed babies have been shown to have a lower rate of illnesses and disease such as diphtheria, pneumonia, asthma, ear infections, and diarrhea.Which of the following is an explanation for this lower rate?

A) The first milk the mother produces contains a high level of white blood cells.
B) Breast milk contains antibodies.
C) Breast milk contains penicillin.
D) Breast milk contains a high level of platelets.