Just put these numbers on a number line. Think money when you are working with negative numbers. if you owed two dollars to someone (-2 from your point of view), you would be much worse off than if you owed him - 0.75 dollars. 50 cents of debt is much better than 75 cents of debt. So - 0.5 is better than - 0.75.
The answer keeps on going like that ending in root(7).
D is in an order, but it is going the wrong way. It is going from largest to smallest.
The other 2 answers almost look random. A mixes plus and minus values. That does not suggest order. B has the 3 minus values all mixed up.
