What can be drawn safely from the case of Genie is that ________

What can be drawn safely from the case of Genie is that ___________.
A、it confirms the critical period hypothesis
B、human’s language acquisition device is independent of other intellectual abilities
C、language cannot be acquired at all after the critical period
D、the language faculty of an average human degenerates after the critical period and, as a result, most linguistic skills cannot develop
【正确答案】：D
【题目解析】：吉妮案例讲述的是一个叫吉妮的美国儿童在出生的第20个月起被单独囚禁，与世隔绝。吉妮在十三岁半被解救出来前失去了语言习得的机会。吉妮在过了语言学习临界期后开始学习母语，至今尚未完全习得英语。该案例表明，人类的语言习得有一个生理的成熟期，也有一个生理的退化期。