Answer:
A). Such as teaching students to solve problems creatively.
Step-by-step explanation:
As per the question, the first option most appropriately revises the italicized part of the sentence by replacing the phrase 'think better' with 'to solve problems creatively.' The given effect('helping students to think better') of musical training is contextually incorrect as music improves the creative skills of the students. As per the context of the sentence, the change of diction from not only helps in clarifying the idea to the legislature but also in persuading them conveniently. Therefore, option A is the correct answer.