Suppose you have triangle ABC and triangle DEF, and they are similar, with a scale factor of 0.5. If the angle measures of ABC are 80°, 80°, 20°, what are the measures of the angles in DEF?
A. 40°, 40°, and 10°
B. 40°, 40°, and 100°
C. 80°, 80°, and 20°
D. Cannot be determined.