ISO/IEC 20000-1 can be applicable to a service provider:

ISO/IEC 20000-1 can be applicable to a service provider:
A . Only if its customers have demonstrated conformity to ISO/IEC 20000 requirements
B . Only if its suppliers haven’t demonstrated conformity to ISO/IEC 20000 requirements
C . Only if its suppliers have demonstrated conformity to ISO/IEC 20000 requirements
D . Even if its customers or suppliers have demonstrated conformity to ISO/IEC 20000 requirements

Answer: D