The literature of this period explored human psychology, relationships, and vulnerabilities. writers experimented with new structures of drama and poetry and used stream of consciousness thinking, in order to try to understand their cultural turmoil.
a. victorian age
b. romantic period
c. modernism
d. postmodernism

This description refers to the era of C. modernism.
This is the time in which literature greatly differed from that of its predecessors. Writers started experimenting with various types of styles, and thus the technique of stream of consciousness was created. This technique was mostly used by James Joyce, Virginia Woolf, and many others at the time. Modernism began in the late 19th century, and lasted throughout the first half of the 20th century.

The answer is ethnic groups.