A large number of deep-groove ball bearings have been operating at 50% of their dynamic load rating for 2 million revolutions. The load is now increased to equal 100% of their dynamic load rating. After how many additional revolutions would you expect 10% of the bearings to have failed?

A) 500,000 revs
B) 750,000 revs
C) 2,000,000 revs
D) None of these