问题详情

Carroll"s statement cited in Lines 2-3 ,Paragraph 2 shows________
[A] the absence of a proper understanding in the nature of language learning.
[B] his anxiety over the situation in the studies of language learning.
[C] the necessity for psychological research on language leaming.
[D] his promise of what he could offer for psycholinguistic studies.请帮忙给出正确答案和分析，谢谢！