Which of these sentences uses incorrect parallel structure?

Which of these sentences uses incorrect parallel structure?
A . Every night, Markie brushes her teeth, puts on her pajamas, and kisses her parents good-night.
B . Sandra likes to hike in the woods, ride her mountain bike, and go swimming with her friends.
C . Michael not only hosted the graduation party for his nephew, but also bought him a vacation package.
D . When he goes to the beach, Ian builds sandcastles, swims in the ocean, and enjoys the warm sunshine.

Answer: B