Answer: When my friend went to the movies, she bought popcorn, and then sat in the front row, and finally, she went out for something to drink. Explanation: just add comments when you would normally pause, so read it out loud and listen for when you stop talking. Further: If you can change the sentence I would say: My friend bought popcorn and a drink when she went to the movies, and she sat in the front row.
I would pick C because the whole feel of the passage seems to be suspenseful considering the words used like the frosty silence, she drew one last deep breath or nearer he came and nearer.