In the sentence, certain words are in bold and numbered from A to E, which are the possible pairs to be interchanged. Choose the pair(s) of words which need to be interchanged to make the sentence grammatically correct and meaningful. The government’s proposal to (

• A reform the education system has faced strong opposition, especially from unions who believe the changes will only (
• B ameliorate the existing problems in schools. While the proposal intends to (
• C exacerbate the current situation, many educators view it as a (
• D setback , not a step forward, given the lack of adequate resources.