What is a good way to ace a level 5-7 maths test? i need some good in particular.

It's important to study and study. I recommend studying the homework or study sheet the day before the test. Most likely the teacher has added a similar problem on to the test. Add a friend to help you study. To make it fun, buy candy and quiz yourself or friends! If you get a problem right, them give yourself candy.

I think the answer is D. Hope this helps!