Correct option is A
The correct substitution of the highlighted words is (a)
on my friends’ posts.
Explanation: The preposition
“on” is correctly used with social media verbs such as
“comment,” “like,” or “post.” The structure “comment on something” is standard English usage.
Grammatical Rule Used: Verbs like
comment,
depend,
concentrate are typically followed by specific prepositions (comment
on, depend
on, etc.)
Example: She commented on his picture yesterday.
Meanings of the other options:
· (b)
of my friends’ posts – incorrect preposition usage
· (c)
around my friends’ posts – implies vicinity, not appropriate
· (d)
in my friends’ posts – incorrect; implies being inside the post