Which grammatical error most severely impacts the 'Grammatical Range and Accuracy' score in IELTS Writing and Speaking, beyond simple errors like subject-verb agreement?

The correct answer to the question "Which grammatical error most severely impacts the 'Grammatical Range and Accuracy' score in IELTS Writing and Speaking, beyond simple errors like subject-verb agreement?" is Option D: Using only simple sentences and failing to incorporate complex sentence structures effectively..

The other options — A) Occasional misuse of articles (a/an/the)., B) Incorrect tense usage, especially when narrating events or discussing past actions., C) Minor spelling mistakes in less common words. — are incorrect for this IELTS Exam Prep question. As explained above: While all options represent errors, repeatedly using only simple sentences significantly limits the 'Grammatical Range' aspect of the score. To achieve a higher score, candidates must demonstrate the…