Which of the following below statements is true? | SOA

A. For a service consumer to interact with a service it must comply to the requirements of the service contract.
B. The service contract is used to express meta data about a service for human consumption only, and compliance to the service contract by service consumers is therefore not required.
C. Service contracts are only used to access a service when the service consumer itself is not a service.
D. All of these statements are true.

Ans:  A