Which of the following statement is not a fundamental difference between L1 and L2 acquisition?
选项：

A:In acquiring the first language, children always concentrate on meaning, while the L2 learning concentrates on rules.
B: In L1 acquisition children apply the rules subconsciously, while the L2 learners are able to verbalize the rules after a period of training.
C:Generally speaking, the first language is acquired consciously, while the second (or foreign) language is learned subconsciously
D:One learns his first language directly from the reality, while the second language is learnt in manageable sequence.