The Gap in Economic Growth Between the Poorest and the Richest

The gap in economic growth between the poorest and the richest countries could be best described as:

A) resulting from technological changes that have allowed the poorest countries to catch up to their wealthier neighbors
B) having widened from about 10 to 1 a hundred years ago to more than 173 to 1 today
C) having narrowed from about 90 to 1 a hundred years ago to less than 75 to 1 today
D) having narrowed the increase in international trade
E) having become of minimal consequence.