Which of the following Python scripts calculates the mean of two variables, "Exam1" and "Exam2", from a CSV file called "ExamScores" that contains four variables: Exam1, Exam2, Exam3, and Exam4? a) import pandas as pd
scores = pd. read_csv('ExamScores. csv')
print(scores[['Exam1', 'Exam2']].mean())
b) import pandas as pd
scores = pd. read_csv('ExamScores. csv')
print(scores[['Exam1', 'Exam2']].median())
c) import pandas as pd
scores = pd. read_csv('ExamScores. csv')
print(mean[['Exam1', 'Exam2']])
d) import pandas as pd
scores = pd. read_csv('ExamScores. csv')
print(scores('Exam1', 'Exam2').mean())