What is the correct way to fill in the missing words related to Mary's situation?

The selection of the second option highlights the appropriate pronouns and context necessary to describe a situation involving Mary. In this scenario, starting with "SHE" clearly identifies Mary as the subject and indicates her gender. Following that, "AT" suggests a location or context where she is present, establishing a setting for the sentence.

Using "SHE" again reinforces the subject's identity, while "HER" correctly designates possessiveness, indicating something belonging to her. The term "STUDENT" appropriately defines her role or status in the context, providing clarity about her position or occupation. The inclusion of "A" specifies that she is one among many students, forming a grammatically correct and coherent structure. Finally, "IN" completes the statement by suggesting where she fits into this narrative.

This choice effectively combines context, pronouns, and roles in a way that makes grammatical sense while clearly describing Mary's situation.