Angle MNO is formed by segments MN and NO on the following coordinate grid:

Angle MNO is rotated 90 degrees counterclockwise about the origin to form angle M′N′O′. Which statement shows the measure of angle M′N′O′? (1 point)

Group of answer choices

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