"Judging a book by its cover" summarizes the impact of​

A) ​etiquette.
B) ​personal charisma.
C) ​integrity.
D) ​surface language.

"Judging a book by its cover" is a saying that means making assumptions about something or someone based solely on their outward appearance, without considering what is inside or underneath. This is related to the idea of surface language, which is the way things appear or are presented on the surface, without delving deeper into their true meaning or substance. Etiquette refers to social norms and manners, personal charisma is the way someone presents themselves, and integrity is the quality of being honest and morally upright. While these concepts may relate to the way someone is perceived, they are not directly related to the idea of judging based on outward appearance.