Angle MNO is formed by segments MN and NO on the coordinate grid: A coordinate plane is shown. Angle MNO has vertices at negative 4 comma 4 and negative 2 comma 2 and negative 4 comma 1 and measures 71.57 degrees.

Angle MNO is rotated 180 degrees counterclockwise about the origin to form angle M’N’O’. Which statement shows the measure of angle M’N’O’?

m∠M’N’O’ = 90 degrees
m∠M’N’O’ = 180 degrees
m∠M’N’O’ = 2 × m∠MNO
m∠M’N’O’ = m∠MNO