My mistake. I did a google search related to angular velocity of bikes and when this came up, I didn't look at the date stamp. The similar problems I was working on for my class included revolutions per second in their calculation and I jumped the gun.
It's a units issue. The 39.4 technically has units of 'revolutions per second'. Divide by 2pi to get your answer in 'radians per second', which can be written as 1/second. This would make the correct result 6.27 radians per second, which matches up to 'e - none of the above'.