单选题
1975 was an important year in the history of animal treatment because ______.
A、
many people began to call for humane treatment of animals that year
B、
a new book was published that broadened the animal rights movement
C、
the environmentalists began to show interest in animal protection
D、
the trapping of animals began to go wild all through the world
【正确答案】
B
【答案解析】
细节分析题。从第二段一开始可以看出这本书给动物权利运动以新的动力，使 1975年以后的运动参加者比他们的前辈们更有说服力。所以1975年成为了动物保护历史上关键的一年。
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