单项选择题

What's the topic in this passage

A．Animal consciousness.
B．Tool use by animals.
C．Animal behavior.
D．Signs of animal intelligence.
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单项选择题
What does the last sentence of the passage mean
A．It's easy to understand animal consciousness.
B．It's easy to understand animals have consciousness.
C．It's sensible to believe in animal consciousness.
D．It's sensible to believe animals have consciousness.
单项选择题
In the third paragraph, a crow is mentioned as an example to show______.
A．crows are cleverer than chimpanzees
B．crows have a certain amount of intelligence
C．non-primates are as intelligent as primates
D．non-primates are able to use tools
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