Select the most appropriate option to fill in the blank.
My mother wrote an application to _____ principal on my behalf.

Correct option is A

The correct option to fill in the blank is (A) the.

Explanation: We use the definite article 'the' before a noun that represents a unique position or a specific person known to both the speaker and listener. In a school or college context, 'the principal' is a specific authority figure.

Example: I had to meet the manager to discuss the issue.

Information Booster: Titles like 'Principal', 'President', 'Prime Minister' are preceded by 'the' when referring to the person holding the office in a specific context.

So the correct answer is (a)