When in a Public Setting, We Expect Others to "Have

When in a public setting, we expect others to "have their faculties in readiness for any face-to-face interaction that might come." This phrase refers to

A) professors who come to class prepared with lecture notes.
B) the old Boy Scout motto about "being prepared."
C) meeting a standard requirement in society concerning physical appearance.
D) being ready to apologize for mistakes you might make in front of others..