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Complete the function update_grade(grades, student, new_grade) that takes a grades dictionary, a student name, and a new grade, then updates that student ' s grade and returns the dictionary. For example, update_grade({ " Alice " : 85, " Bob " : 90}, " Alice " , 95) should return { " Alice " : 95, " Bob " : 90}.
Correct Answer: A
A dictionary stores data as key-value pairs. In this function, the student name is the key, and the grade is the value. Correct code: def update_grade(grades, student, new_grade): grades[student] = new_grade return grades Example: update_grade({ " Alice " : 85, " Bob " : 90}, " Alice " , 95) Result: { " Alice " : 95, " Bob " : 90} Python's built-in types documentation includes dictionaries as mapping types, where values are accessed and updated using keys. Therefore, the correct answer isA.