Which of these sentences does not contain parallel structure?
a. i stay fit by walking daily, swimming weekly, and eating healthy.
b. my sisters always bicker over who gets to drive the car, wear the newest dress, and having the best boyfriend.
c. open your notebook, get out your homework, and place it on you desk.
d. the puppy looked under the tree, beside the swings, and near the bushes, but he couldn't find his toy bone anywhere.