Question: To compare two strings with mixed uppercase and lowercase letters, a programmer can first use the a . upper ( ) method to convert all

To compare two strings with mixed uppercase and lowercase letters, a programmer can first use the
a. upper() method to convert all characters after the first character in each string to uppercase.
b. upper() method to convert the first character in each string to uppercase.
c. lower() method to convert all characters in each string to lowercase.
d. lower() method to convert all characters after the first character in each string to lowercase.

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