A "Students should be discouraged from using colloquial expressions to ensure they use formal language in all situations."
B "Students should only learn standard English to avoid confusion and ensure clear communication."
C "Language learners should focus exclusively on grammatical rules and ignore variations in pronunciation and vocabulary."
D "Teaching English should avoid discussing any non-standard forms to maintain a uniform learning experience."
E "Understanding regional accents and dialects helps students appreciate diverse ways of speaking and improves their overall communicative competence."