As an infant, Chloe had typical childhood illnesses and no significant earaches. However, Chloe is now age 4 and she is experiencing frequent earaches. What is the most likely reason for this?
A. Chloe attends preschool and picks up many more infectious bacteria and viruses than she did at home.
B. Chloe attends preschool, and the noise level of the other children playing aggravates her hearing and gives her earaches.
C. Chloe's eustachian tube has changed position, and this change can lead to an increase in earaches.
D. Chloe has developed an allergy to the shampoo her mother uses to wash her hair, and the result is inflammation in her eustachian tubes.
Answer: C
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