The Broom Riddle (Solution) ft. Kurt Hugo Schneider part 3/3

We know that by C the first vertical gets crossed at the top 1/1
So of you see by A the line crosses the first vertical at 1/3 and by B the line crosses the first vertical by 1/2 
A+B=
1/2+1/3=5/6
Wich is less than 1/1 so
(A+B)=less than C