Angle ABC is formed by segments AB and BC on the coordinate grid below:

A coordinate plane is shown. Angle ABC has vertices at 3 comma 4 and 5 comma 3 and 3 comma 2 and measures 53.13 degrees.
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

Question

Angle ABC is formed by segments AB and BC on the coordinate grid below: 

A coordinate plane is shown. Angle ABC has vertices at 3 comma 4 and 5 comma 3 and 3 comma 2 and measures 53.13 degrees.  
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