American writer john steinbeck is known for writing books that a) deal with the plight of the poor b) have thought-provoking conclusions c) address the question "am i my brother's keeper? " d) all of the above'

d) all of the above

Explanation:

All of these are examples of themes that are associated with the writer John Steinbeck. John Steinbeck was an American author, best known for his novel Of Mice and Men (1937). However, he is also known for his works Tortilla Flats (1935), Cannery Row (1945), East of Eden (1952) and The Red Pony (1937). He depicted the plight of the poor during the Great Depression, and often tried to lead his readers towards thought-provoking conclusions. He received the Nobel Prize in Literature in 1962.