You are developing an ASP.NET MVC application that uses forms authentication against an Oracle database.
You need to authenticate the users.
Which code segment should you use?

A.
Option A

B.
Option B

C.
Option C

D.
Option D

Explanation:
When implementing a custom membership provider, you are required to inherit the MembershipProvider
abstract class.
There are two primary reasons for creating a custom membership provider.
You need to store membership information in a data source that is not supported by the membership providers
included with the .NETFramework, such as a FoxPro database, an Oracle database, or other data source.
You need to manage membership information using a database schema that is different from the database
schema used by the providers that ship with the .NET Framework. A common example of this would be
membership data that already exists in a SQL Server database for a company or Web site.
MembershipProvider Class
https://msdn.microsoft.com/en-us/library/system.web.security.membershipprovider(v=vs.110).aspx