According to Obama, what was the profound mistake of Reverend Wright's sermons?

What he said, by his own words was "The profound mistake of Reverend Wright’s sermons is not that he spoke about racism in our society, it’s that he spoke as if our society was static, as if no progress had been made, as if this country, a country that has made it possible for one of his own members to run for the highest office in the land and build a coalition of white and black, Latino, Asian, rich, poor, young and old, is still irrevocably bound to a tragic past. What we know, what we have seen, is that America can change, that is the true genius of this nation." You can shorten this down how ever you want, this is just the smallest part that I thought was fully important.

Explanation:

the answer is:

b) to show the progression of inventions that took place in the bicycling industry.

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