This would be a fragment. The is no point making it impossible to be a sentence. It would be her pet armadillo is brown and his name is George. To make it a sentence.
Answer:
Just as the final school bell rang, Ms. Smithers handed Denise the math test. Denise turned away and flipped it over to reveal the grade, and was so over joyed she then she stepped out into the hallway and closed the door. She Denise walked down the school hallway and out into the afternoon where her mother was waiting. Denise was so exited she showed her the test, and her mother was happy too.
I believe the second one if wrong maybe the last choice