Which of Zheng He, Vasco da Gama, or Christopher Columbus was the greatest 15th century mariner, and why? Give at least two pieces of evidence to support
your answer.

for your : )

true

coz they had the rank system in society according to the economic power of the people

it for the workers lik if you have a job thats what its for

explanation:

hello!

according to the passage the most suitable options are two. the first one is "by leading the aef to victory in several key battles" like the battle of saint- mihiel and the battle of cantigny mentioned in the passage you copied here. the second one is "by the aef and allied forces defeat germany" since the passage says that his army destroy the german resistance in the meuse- argonne offensive. and also, "by insisting that the aef operate as an independent force".

hope this