Which invention improved Mayan agricultural methods? O the relief
O the codex
O the 365-day calendar
O the concept of zero

C). the 365-day calendar

Explanation:

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according to the quotation from booker t. washington's 1895 atlanta compromise speech.

in the great leap from slavery to freedom . . the masses of us are to live by the production of our hands . . we shall prosper . . as we learn to dignify and glorify common labor.

washington believed that  hard work had its own kind of dignity.

explanation:

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women should have the same rights as men