Answer:

Choice B
Level of Difficulty E M H

Some problems simply involve "playing around" until you get the right answer. If you play around with the given sequence of letters, you will notice that switching the W and Y will produce:

Z Y W X

Then, switching the W and X will give:

Z Y X W

Now all we need is to reverse the entire sequence to get:

W X Y Z

and we have alphabetical order with three (3) changes, or choice B.

For more practice with sequences, go to Skill Set 17: Sequences.

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