What Facebook post type can be selected so that comments can only be viewed by the customer?

The correct answer, which specifies the use of a private message, is appropriate because private messages on Facebook are designed for one-to-one communication between users. When a customer sends or receives a private message, the content of that message, including any comments or replies, is only visible to the sender and the recipient. This level of privacy ensures that conversations or comments are confidential and not accessible to other users, making it the ideal choice for instances where a customer wants their comments to remain private.

In contrast, public posts and general comments are inherently designed for broader visibility, where comments can be seen by anyone who has access to that post. An event invitation also does not ensure comment privacy, as it is directed at a group of people or all friends, often leading to public visibility of the interactions within that context. Thus, the private message option distinctly meets the requirement of confidentiality for customer comments.