Please help , this is english

D all of the above

Explanation:

These playwrights are all famous writers of the early-mid 20th century who wrote realistic dramas, often tragic, to display the failings of the world. All are contemporaneous.

Hansberry is best known for A Raisin in the Sun, a masterpiece about blacks in America.

Williams wrote prolifically, but Cat on a Hot Tin Roof is one of his most well-known.

O’Neill wrote such works as The Iceman Cometh and Long Day’s Journey Into Night, both philosophical in nature, meant to expose the vices of modern society.

c) problem and solution