Answer:
a) You need to respect your friends so that they respect you.
Explanation:
The popular saying is related to the golden rule, which states that you should treat others in the same way you would want them to treat you. For example, if you want people to respect you, you have to respect them first.
Respecting yourself doesn't necessarily mean others will respect you. This makes choice b incorrect.
The saying doesn't talk about self-esteem, thus making choice c incorrect.
The saying doesn't show the relationship between "self-respect" and "respecting others." This makes choice d incorrect.