Which line serves as the boundary line between one day and the next?
a.
the international date line
b.
the arctic circle
c.
the prime meridian
d.
the equator

A.the International Date Line

Explanation:

The international Date Line, located in the pacific ocean is what marks when a day starts and when the other ends, if you travel from asia to America, you would go one day backwards in the calendar, and if you go from America to Asia, you will travel a day forward. The international Date Line is located geographically 180º degrees west from the greenwich meridian.

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:

mark brainliest and have a great day!