Why does Carnegie believe that mediocrity is not a path towards success?

Andrew Carnegie was an outstanding child, from a poor immigrant to the second richest man in US history (Adjusted to inflation)

mount st. helens in washington erupts, causing a massive avalanche and killing 57 people on this day in 1980. ash from the volcanic eruption fell as far away as minnesota. seismic activity at mount st. helens, which is 96 miles south of seattle, began on march 16.

the right answer is d