A student uses the arrangement of spheres to investigate the rearrangement of electric charge by induction. The student brings a negatively charged block horizontally from the right, directly toward sphere 2, until the left edge of the block is at a position of \displaystyle {x}={15}x=15 cm . The student measures the relative magnitude of the charge on each sphere while moving the block, although the student cannot directly measure the amount of charge on either sphere. The student's data are shown. Which of the following could be true based on an analysis of just the data in the table?
O There is no polarization of charge induced on the block.
O The motion of electrons is responsible for the observed change in the charges.
O When the block is farther than \displaystyle {x}={35}x=35 cm , the magnitude of the charge on sphere 1's surface could be greater than the magnitude of the charge on sphere 2's surface.
O Negative charge moves from sphere 2 to sphere 1 to maintain a constant force between the block and sphere 2.