1. Which sentence demonstrates an error in parallel structure? As an associate editor

1. Which sentence demonstrates an error in parallel structure?
As an associate editor at a publishing company, Brittany not only works on literature
A. textbooks but also edits poetry anthologies.
After graduation, I will go either to the University of Texas like my father or I will go to
B. Florida State University like my mother.
The players on the soccer team are both disappointed with losing the championship game
C. and proud of making it so far in the tournament.
With the temperature rising to near 100 degrees, Emilio must either hire someone to repair
D. his AC or buy a large supply of oscillating fans for his house.