Which of the following Python scripts calculates the mean of two variables, "Exam1" and "Exam2", from a CSV file called "ExamScores"? Oimport pandas as pd scores = pd.read_csv('ExamScores.csv') print(scores{'Exam1', 'Exam2'].mean()) O import pandas as pd scores = pd.read_csv('ExamScores.csv') print(mean[['Exam1', 'Exam2']]) Oimport pandas as pd scores = pd.read_csv('ExamScores.csv') print(scores[['Exam1', 'Exam2']].mean()) Oimport pandas as pd scores = pd.read_csv('ExamScores.csv') print(scores[['Exam1', 'Exam2']].median())