-take off graduate assistant, she is going to post the grades over her is/are going to post the grades.
-is over her because when its OR you only look at the second name and she is singular.
A. Either the graduate assistant or her are going to post the grades.
B. Either the graduate assistant or her is going to post the grades.
C. Either the graduate assistant or she are going to post the grades.
D. Either the graduate assistant or she is going to post the grades.
