Suppose that intern Et Lies claims that a magnetic field could explain planetary orbits better than gravity. The Earth's mass is 5.97 X 1024 kg, Earth's radius is 6,371 km, and Earth's orbital radius is about 1.50 X 108 km. If the Earth has an amount of electric charge sufficient to produce an average electric field value of 153 V/m at its surface, what minimal magnitude of magnetic field would be required to explain Earth's orbital motion, assuming gravity to be completely absent? Hint: use Gauss' law to find Earth's charge.

It should be d if not then c

My answer is opptionc, just check with anyone else

Is this a question of an answer

You need to be more specific.  i really don't know what a "motion map" is.you can draw a graph of an object's position, distance, displacement, speed,velocity, or acceleration versus time, or you can draw a graph of the object's x-position versus its y-position and not give any information about time at all.if the graph presents position or displacement against time,  then constant velocity is a straight line . . i.e. a line that has  constant slope.if the graph shows speed against time, then constant velocityis a horizontal piece of line.if the graph shows acceleration against time, then constant  velocity is a piece of line that lies on the x-axis . . it's value is zero.