What will be the output of the following Python code snippet?

x = 'abcd'
for i in range(len(x)):
    x[i].upper()
print (x)

A. For Loop B. While Loop C. Do-While Loop D. Infinite Loop

A. 2
3
4
5 B. 1
3
4
6 C. 3
4
5
6 D. 1
2
3
4

A. For Loop B. While Loop C. Do-While Loop D. Infinite Loop

A. Exit the loop B. Skip the current iteration C. Continue to next iteration D. Pause the loop