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.

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单项选择题

The view that animals have consciousness may not be convincing to all because______.

A．there is not sufficient evident to prove it
B．there is not rigorous evidence to prove it
C．there is not scientific evidence to prove it
D．there is not direct evidence to prove it