Ethical topics are often closely related to issues of law, etiquette, or religion.

Which of the following is an issue of etiquette?

a$.)$ It's considered bad manners to burp at the dinner table.

b$.)$ My mother taught me to never take the Lord's name in vain.

c$.)$ Irving stops his car at the crosswalk to allow pedestrians to cross.

d$.)$ I don't eat meat because I am against animal cruelty.