According to Second Language Acquisition research, what is the criterion applied to learners?
1
The learner has to aspire to attain the standards of native speakers.
2
The learner has to aspire to attain the standard of International English.
3
The learners has to aspire to attain the standards insisted by International Phonetic Association and British Broadcasting Corporation.
4
The learner has to aspire to attain the standards set by them which are appropriate.