Read the following passage and choose the option that be...

A

teachers can expect learners to acquire a certain grammatical structure after being led through a developmental sequence;

B

teachers cannot expect learners to acquire a certain grammatical structure which is too complex;

C

learners need a particular amount of time to internalize a certain grammatical structure;

D

as the learner's interlanguage develops, he will master structures in sequence;

E

learners go through a complex process of developing a certain grammatical structure.