Sentence lacks parallel structure?

A. We had a delicious breakfast of bacon and eggs in bread and butter.
B. A doll, a video, and a wagon were the items on the little girls list.
C. Tanya and her friend Tammy we're studying biology and watching science films until late last night.
D. Because he waited to the last minute to study, finish his Labs too late, and is lacking motivation, Jonathan failed science.