Scientists believe that Earth's tectonic plates move due to: convection.
the magnetic pull of the poles.
bombardment by objects from outer space.
Earth's spinning around its axis.

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the awnser is a

it is not b or c

it deviates because of the date.

explanation:

the international date line is an imaginary zig zag line on the surface of the earth roughly following the 180 degree meridian. crossing the date line causes the date to be changed exactly by one day. crossing the line from east to west , one loses a day . and from west to east, one gains a day.