Which code segment should you use?

You are developing an ASP.NET MVC application that enables you to edit and save a
student object.
The application must not retrieve student objects on an HTTP POST request.
You need to implement the controller.
Which code segment should you use? (Each correct answer presents a complete solution.
Choose all that apply.)

A.
Option A

B.
Option B

C.
Option C

D.
Option D