【正确答案】：
A. NATURALISM WAS GREATLY INFLUENCED BY DARWIN’S EVOLUTIONARY THEORY AND FRENCH LITERATURE.
B. NATURALISTS ACCEPTED THE MORE NEGATIVE IMPLICATIONS OF DARWIN’S THEORY AND USED IT TO COUNT FOR THE BEHAVIOR OF THOSE CHARACTERS IN LITERARY WORKS WHO WERE CONCEIVED AS MORE OR LESS COMPLEX COMBINATIONS OF INHERITED ATTRIBUTES, THEIR HABITS CONDITIONED BY SOCIAL AND ECONOMIC FORCES.
C. NATURALISM IS EVOLVED FROM REALISM WHEN THE AUTHOR’S TONE IN WRITING BECOMES LESS SERIOUS AND LESS SYMPATHETIC BUT MORE IRONIC AND MORE PESSIMISTIC.
【题目解析】：A.自然主义深受达尔文进化论和法国文学的影响。B.博物学家接受了达尔文理论的更多负面影响，并利用它来计算文学作品中那些人物的行为，这些人物或多或少被认为是遗传属性的复杂组合，他们的习惯受到社会和经济力量的制约。C.自然主义是由现实主义演变而来的，当作者的写作语气变得不那么严肃、不那么富有同情心，而是更加讽刺和悲观。