The answer is: [E]: the British Commonwealth .
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When a flood occurs, the stream is getting much more water, and on the parts where the angle of fall is greater and the stream is faster, because of the greater amount of water, and thus force, it managed to take with it much bigger amount of sediments, and also much bigger pieces of it.
The transportation depends on the speed and force of the water, and when there is a flood. both of those are bigger, so the stream is able to carry more sediments over a longer distance, but also over a wider area as the waters are getting out of the normal river flow and flood the valley.
Angola 1975-2002 (27 years)
Liberia 1998-2003 (14 years)
D.R Cong 1997-1999 (2 years)
Ethipo 1974-1991 (17 years)
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The answer is A, it is the scientists belief that there was
a massive Colum of dust in the beginning. It formed to make the sun as its
central mass and some of it aligned around the central mass of sun. And the
gravitational pull of the mass kept the planets revolving around the sun.