Line AE and line DF are parallel. If m∠ABG = 10x and m∠HCF = 9x + 10, what is m∠ABG?
points B and C are on line GH between points G and H, line AE intersects with line GH at point B, line DF intersects with line GH at point C.
A. 10°
B. 80°
C. 98°
D. 100°