What is a customer touch point?

Question $5$ options:

A$)$

Interaction points that are between a company and its customers, without the involvement of third parties such as channel intermediaries

B$)$

Any stage of the marketing process where it's up to the customer to choose whether to interact with the company

C$)$

Any real or virtual point where customers directly or indirectly interact with the company

D$)$

The "high touch" aspect of personal services, including personal selling

E$)$

Direct interaction with tangible products; does not apply to intangible services