Answer:
The correct answer is the option E: All of the above are true.
Step-by-step explanation:
To begin with, in the field of marketing the services are considered to be very different from the products in terms of characteristics because the first ones are always unique, intangible and heterogenous. Moreover, they cannot be stored and its production and consumption happens at the same time because when someone demands for a service then that particular job happens, therefore meaning that is being produced and consumed at the same moment. In addition to that, it is quite obvious that when the service is happen the costumer is taking active part in it due to the fact that the service is focus on him and that is why that the client is an input as well.