Which will win the race?

As the image shows, OO is the center of a circle, EE is at the bottom of the circle, and AE,BE,CE,DEAE,BE,CE,DE are all smooth inclines along the circle.

Now, let's put four balls at rest at points A,B,C,D.A,B,C,D.

If whichever gets to point EE first wins the race, ignoring all the frictions, which ball will win the race?

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