Answer:
C.
Explanation:
The term "most popular" is not an opinion and can be measured once defined.
Insecurities because no matter who you are in life at some point in time you felt like you didn’t fit in or you didn’t belong or there is something you don’t like about yourself and everybody can understand that feeling.
The answer is A, Did not like.
I sharpened my skills under the mentorship of my coach.
You need a noun to complete this sentence, and mentorship is the only noun here - the rest of the words are adjectives.