Is the sentence “after mexico won independence” a phrase, independent clause, or subordinate clause

tbh i think its a independent clause but if its wrong but if it is please forgive me

My answer is that it is a subordinate clause

jessica, a teenage girl who just wants popularity, does everything to get attention. she puts her hair in a bun and steals her mom's lipstick and such. but then she takes something and it makes her inside and outside appearance  go bad.

i just came up with that in less than 60 seconds, but tweak it up if you like it.

explanation:

you didn't give a theme but i did a question like this a while ago so i hope this is what you were looking for.

c.to compare several aspects of the tragedy to other worldwide tragedies