In a tax preparation service, what role does the customer play in the transformation process?

1. In a manufacturing firm the inputs, the process, and the outputs are usually obvious. 2. In a service firm the conversion is less obvious, because part of what goes in comes from the customer. 3. A tax preparation service combines the knowledge of the tax preparer with the client's information about personal finances. 4. Only when both are present can the tax return be completed. 5. So the customer is a supplier of inputs rather than a bystander, which rules option C out. 6. The preparer still does the professional work, so option B overstates the customer's role. _Source: OpenStax Introduction to Business (CC BY 4.0), Ch 10 "Achieving World-Class Operations Management", section Converting Inputs to Outputs_