Acommon food allergy for young children is soy rice oats bananas

The answer is soy. Even though bananas cause allergies too, but soy affects the most children. 
Young children is allergic to soy because the body mistaken that the protein in soy is harmful, then creates antibodies to protect the children. 
However, many children outgrows the problem.

B. would complete your answer. give me brainliest!