Positive body language has a good impression on customers. It makes the customers believe you.

True

Having an impression of someone means forming a perception or opinion about them based on your interactions, observations, or experiences with them. It can be positive, negative, or neutral.

A positive way to say "You can't do it" is "It doesn't suit you" or, "I think you would do better in _____". Or "I am afraid I have to say____"

Whenever you meet a person you do not know, it is VERY important that you give them a good impression. Remember, ALWAYS be yourself !