Which sentence has correct punctuation? i have always wanted to become a veterinarian, but, i don’t do very well in science and math classes. i have always wanted to become a veterinarian but i don’t do very well in science and math classes. i have always wanted to become a veterinarian, but i don’t do very well in science and math classes. i have always wanted to become a veterinarian but, i don’t do very well in science and math classes.

The sentence that has correct punctuation is the following one: I have always wanted to become a veterinarian, but I don't do very well in science and math classes.

Explanation:

The sentence above is the right answer because you should use a comma before the coordinating conjunction. When two independent clauses are joined with a coordinating conjunction (but, in this case), a comma is required before the conjunction. Otherwise, the sentence would become a run-on sentence.

(i can't select because there is no options but, i will answer) using evidence effectively. most of the assignments you will do in university will ask you to make an argument, to take a stance, or to prove a hypothesis. the best way to do this is to research the topic, develop a thesis statement, hypothesis, or claim and then use evidence to support this claim.

i would think its c but i'm not sure