The three dimensions on which services can differ are

A$.$

the expense of the$$ service, the degree of$$ customization, and the level of customer contact.

B$.$

the nature of the service$$ package, the lead time required to provide the$$ service, and the degree of customization.

C$.$

the nature of the service$$ package, the degree of$$ customization, and the degree of customer contact.

D$.$

the lead time required to provide the$$ service, the expense of the$$ service, and the nature of the service package.