Which of the following topics would not be studied by a developmental psychologist?A. How infants and children react to familiar individuals and strangers from the time they are born until they are five years oldB. Whether sleep habits are associated with academic achievement in 10-year-oldsC. Whether changes in cognitive functioning are observed from adulthood into old ageD. Whether three-year-olds engage in different types of play than five-year-olds or seven-year-olds