Harry and Sandra Work on the Same Team for Chemvo

Harry and Sandra work on the same team for Chemvo Chemical Supply Company.They were both busy over the weekend for different reasons and failed to show up to work the next day.When they returned to work,Harry was only given a verbal warning but Sandra was terminated.Which of the following statements is true in this situation?

A) Sandra has a claim for gender discrimination as it is illegal to discipline one gender for an act for which the other gender is not disciplined.
B) Sally does not have a claim for gender discrimination if Harry belongs to a protected class.
C) Sandra does not have a claim for gender discrimination because of the privileges available to employers under the employee-at-will doctrine.
D) Sandra has a gender discrimination claim only if she has more seniority than Harry at work.