The researchers conducted a prospective cohort study of the association between exposure to industrial glues and respiratory problems in children. The study included 55 children. What is the greatest problem in this study?

Group of answer choices

A.Information bias because the very small size of the study

B.Random error because of the very small size of the study

C. Confounding because of the very small size of the study

D. Selection bias because the very small size of the study