Which sentence uses incorrect parallel structure?
A.Jonathan enjoys hunting for falcons, spending time with family, and painting the landscapes.
B.Steve is not only talented as an athlete, but also as an actor in theater and performing arts.
C.The fried chicken was oily, grease was on the garlic bread, and the potatoes were cold.
D.The workers at the factory promised to be more vigilant, and to work more quickly.
