What teaching method is used by the teacher if much of his/her class time is spent on drilling sentence patterns followed by exercises like repetition, memorization, mimicry,etc?

题目：What teaching method is used by the teacher if much of his/her class time is spent on drilling sentence patterns followed by exercises like repetition, memorization, mimicry,etc?

A、 The Nature Approach.
B、 The Audio-lingual Method.
C、 The Grammar-translation Method.
D、 The Communicative Approach.