What kind of experience did the romantics mostly write about?
a. the experience of animals
b. experiences rooted in history
c. collective experiences
d. individual experiences

The Romantics mostly wrote about D. individual experiences. 
They were usually very sad with their lives, and would often liken the feelings of their protagonists to the weather conditions - if the hero of a poem was sad, the weather was cloudy and it was raining. 

The correct answer is C) Della had cut off her hair to buy Jim's gift.