[Shhhh!!!! I'm Listening to Reason!]

Prior to 1950 the percentage of Blacks in the NBA was zero.

Now it's at about 80%.

Is this because:

1. Whites have become worse basketball players.

2. Blacks have suddenly excelled at this sport.

3. The rules have changed due to a federal mandate and now favor the
rules favor black athletes.

4. Refs favor black athletes because they're mostly black themselves.