Many researchers ___ the impact of social media on mental health since the early 2000s.
✓ Correct Answer: Option A
The phrase 'since the early 2000s' indicates an action that started in the past and continues to the present, requiring the present perfect tense ('have studied').
📚 About This IELTS Exam Prep Practice Question
This 2-level IELTS Exam Prep question from the Grammar topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.
How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free IELTS Exam Prep practice test or use flashcards for spaced repetition review.