Answer:
A, Offer a guarantee for the customer's complete satisfaction.
Step-by-step explanation:
SInce services are inseperable beacuse there cannot be trials unlike in some goods, the only way to keep a customer's mind at rest over the service he or she is getting to give a guarantee as to the quality of the service such that the customer is satisfied and can purchase the service.
For example, giving a customer a time frame for the durability of a service and also a consideration for re-service before the set or supposed time is a way of giving customer guarantee about a service he or she is purchasing
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Cheers.