Which code segment should you use?

You are developing an ASP.NET MVC application. The application is an order processing system that uses
the ADO.NET Entity Framework against a SQL Server database. It has a controller that loads a page that
displays all orders along with customer information. Lazy loading has been disabled.
The Order class is shown below.

You need to return the orders and customer information in a single round trip to the database.
Which code segment should you use?

A.
Option A

B.
Option B

C.
Option C

D.
Option D