<p>Here is a technique that I often use throughout the SAT (and other multiple choice tests) that I've finally found a perfect example of. </p>
<p>On multiple choice tests, there is only one correct answer. Therefore, if two answer choices are equivalent, then both of the answer choices are incorrect.</p>
<p>This is only foolproof in math sections, though it does come in to play when words in sentence completions are synonymous.</p>
<p>@eagle16, basically, two equivalent answers cannot be correct because that would mean that the question has more than one correct answer. However, on the SAT and most multiple choice tests, there is always only one correct choice. Does that help?</p>
<p>You can’t eliminate both A and B, since angle XAY < angle XBY. However you can easily eliminate B because of this. C and E are also incorrect.</p>
<p>Between A and D, D is the correct answer. Note that angle XAY = 45 deg. If D was moved so that YD = 1, then angle XDY would be 45. But YD > 1, so angle XDY is less than 45 degrees. This means that D is correct.</p>