The strong version of the Sapir-Whorf hypothesis proposes that the language we speak determines the way we perceive the world and therefore the nature of ______.

A. thought was the soul’s discourse with itself
B. thinking involved the same motor activities used in speaking
C. mankind could not have the same languages and languages were but signs of psychological experiences
D. thinking was a system of movements that had been reduced from actual speech to the point where they were no longer visible.

A. it confirms the critical period hypothesis
B. human’s language acquisition device is independent of other intellectual abilities
C. language can not be acquired at all after the critical period
D. the language faculty of an average human degenerates after the critical period and consequently, most linguistic skills cannot develop