Answer: both forms of transportation accelerated production and distribution of goods.
Explanation: wider and faster distribution
The Volga river is the largest river in Europe, so that should be the answer.
South Africa= around 55,000,000 of total population (based on 2015 data)
Nigeria= around <span>185,000,000 of total population (2015 data)
Angola = around </span><span>25,000,000 of total population (2014 data)
Congo= around </span><span>82,000,000 of total population (2015 data)
Given that there's not an high </span>population growth or <span>birth rate or something like that, I'd say Nigeria </span>
Increase energy as it falls