that young babies learn to do things because certain acts lead to awards.
| A．It is widely accepted |
| B．What is widely accepted |
| C．Which is widely accepted |
| D．That is widely accepted |
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that young babies learn to do things because certain acts lead to awards.
| A．It is widely accepted |
| B．What is widely accepted |
| C．Which is widely accepted |
| D．That is widely accepted |
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