or
or
Everyone should respect ___ parents.
Everyone should respect ___ parents.
The most inclusive and gender-neutral option is "their" (option c). This is because "their" is a pronoun that can be used to refer to a singular, gender-neutral antecedent, such as "everyone" in this case. Using "their" in this context ensures that the sentence is applicable to individuals of any gender, and it is a common and accepted practice in modern English to use "their" as a singular gender-neutral pronoun. Therefore, the correct choice is:
Everyone should respect their parents.
