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Answer:
C
Step-by-step explanation:
For two shapes to be similar they must have a set ratio. The only one that does have a set ratio is Y.
So the answer is C
The ratio is 1 : 2
1 * 2 = 2 = w = Yw (the width for rect y)
2 * 2 = 4 = l = Yl (the length for rect Y)