A9-month-old girl is suffering from vomiting, lethargy, and poor feeding behavior. her mother reports that the symptoms began shortly after the baby was given some cereal and mashed bananas by her grandparents. the baby's symptoms seemed to resolve after breastfeeding was resumed. which of the following enzymes is most likely deficient in this individual? galt. fructokinase. galactokinase. aldolase b.