Answer:
c.cost of services account
Explanation:
A service organisation is defined as one that committed to the welfare of its customers and it's members. They focus on providing services to the client rather than products.
When services are rendered the costs are transfered to an account called the cost of services account.
Cost of services account includes all costs directly involved in delivering a service to a customer. It can include labour, shipping and materials.
The focus is how much it costs to deliver a service by the organisation rather than a physical good.