Angle ABC is rotated 90 degrees counterclockwise about the origin to form angle A'B'C'. Which statement shows the measure of angle A'B'C'?

m∠A'B'C' = 90 degrees

m∠A'B'C' = 180 degrees

m∠A'B'C' = m∠ABC

m∠A'B'C' = 2 * m∠ABC

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