Appeals to logos were common in colonial era rhetoric because so many people believed in
a. romanticism
b. patriotism
c. rationalism
d. symbolism

Appeals to logos were common in colonial era rhetoric because so many people believed in C. Rationalism.
Logos is an appeal to your logic, and logic means that you are thinking rationally. Rationalism was an era that valued reason and logic, so this has to be the correct answer.