What were two advantages of the silent -barter system

donald carl johanson (born june 28, 1943) is an american paleoanthropologist. he is known for discovering – with yves coppens and maurice taieb – the fossil of a female hominin australopithecine known as "lucy" in the afar triangle region of hadar, ethiopia.

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(b) britain had a much larger navy than the u.s.

(d) the u.s. had a small army compared to britain.