Fill in the blank with the most appropriate word. She was completely blind ___ her faults.
The correct option is D to
Option "D" is the correct answer.
A Preposition is a word used to link noun, pronoun or phrases to other words within a sentence.
In the first blank, preposition "to" will be used because preposition "to" is used to indicate a relationship between two things or person or to show the inclination of something on someone. In the given sentence, the girl has a relation with her faults.