Answer:
A student should keep her password a secret.
Step-by-step explanation:
An antecedent is a word or group of words that a pronoun refers to, so in order to make a sentence clear, they should be in an agreement. In the sentence, "student" is the antecedent, and "her" is the pronoun that the antecedent refers to, however, such pronoun is not in agreement with the antecedent because "a student" does not indicate which genre it is referring to, but "her" indicates that it is a female. Therefore, in order to correct the error, we must replace the pronoun "her" with "their" or "her or his" which indicate that the student refers to both female and male.