Why Is Contrastive Analysis a Nonproductive Teaching Methodology

Multiple Choice

Why is contrastive analysis a nonproductive teaching methodology?

A) There is no evidence that learners will find phonemic differences between languages to be difficult.
B) There are only slight phonemic differences across all languages, and these do not need to be taught.
C) There are some phonemic differences between the English language and other languages that learners will find impossible to learn.
D) Phonemic differences are irrelevant to the construction of correct words, phrases, and sentences.