For Administrators creating new Service Catalog items, what is a characteristic they should know about Service Catalog variables?

For Administrators creating new Service Catalog items, what is a characteristic they should know about Service Catalog variables?
A . Service Catalog variables can only be used in Record Producers
B. Service Catalog variables can only be used in Order Guides
C. Service Catalog variables cannot affect the order price
D. Service Catalog variables are global by default

Answer: D