【单选题】
You need to implement an authentication method on SQL4. The TravelOnline database will be accessed through a Web services application. You need to make the authentication method as secure as possible.What should you do？（）
A、Create an HTTP endpoint with NTLM authentication， and create a service principal name （SPN）.
B、Create an HTTP endpoint with digest authentication， and create a service principal name （SPN）.
C、Create an HTTP endpoint with integrated authentication， and create a service principal name （SPN）.
D、Create an HTTP endpoint with Kerberos authentication.
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