Fence X is twice as long as fence Y, and fence Y is 4 feet shorter than fence Z. If 3 feet were added to each fence, which of the following must be true?
I) X is twice as long as Y.
II) Y is 2 feet shorter than Z.
III) X is longer than Z. Choose the correct choice.
A) I only  B) II only  C) III only  D) I and II  E) II and III
If X= 6   Y= 3   Z= 7   Then, after adding 3 feet to each:   X= 9   Y=6   Z=10   And the answer would be II only, which is wrong.
<result>B</result>
Fence X is twice as long as fence Y, and fence Y is 4 feet shorter than fence Z. If 3 feet were added to each fence, which of the following must be true?
I) X is twice as long as Y.
II) Y is 2 feet shorter than Z.
III) X is longer than Z.