The three dominant figures of the American realism are the following except ______.

单项选择题Naturalism is evolved from ______ when the author’s tone in writing becomes less serious and less sympathetic but more ironic and more pessimistic.

单项选择题The impact of Darwin’s evolutionary theory on the American thought and the influence of the nineteenth century French literature on the American men of letters gave rise to yet another school of Realism: American ______.