Most commonly "C", because they would want the reader to understand that something is different. Yes, they can change the style whenever they want to, but it would be more meaningful if they did it for a reason.
Answer:
The best answer would be B
Explanation:
It is not A, because that wouldn't really make sense, no where does it say or point out that she is famous in any way.
It would be B, because of the sentence "As she looked out at her friends and family, her eyes glistened with tears", it points out that she's proud and happy to have them there, their probably happy to be there as well, and so very proud of Jenna.
It is not C, because "her eyes glistened with tears", that phrase means that she was so happy she teared up, nothing about shaking or similar words that mean nervous.
It is not D, because it says that "she climbed the stairs to the stage", not her Friends, and it says "she looked out at her friends and family", which means that their in the crowd.
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.