Answer:
Her.
Explanation:
In the English construction, the construction of the words plays an important role in how the sentence is made. This construction is known as the syntax in the English language.
In the given sentence, the pronoun "her" will be best used in the given blank. For the sentence, the pronoun "her" indicates the person as the object while "she" makes it the subject. So, the object "her" will be best used rather than the subject "she".