which of the following is an unethical behavior for a salesperson?

Atelling the customer that the low-price item they want is unavailable so they will have to buy a more expensive product.

Bfinding out what types of products the customer like so you can show the things they will be more likely to buy.

Cnegotiating a price with the customer who does not wish to pay the "list price"

Demphasizing only teh best features of a product during the sales presentation.