Which layers form earths rigid, mobile tectonic plates? a) crust and lower mantle b) inner and outer core c) upper and lower mantle d) crust and upper mantle

D. crust and upper mantle

because it is the two uppermost layers that moves the plates to create earthquakes, landslides, etc.

A is wrong because there is another layer in between the two called the upper mantle.

B and C is wrong because they do not contain the crust, the outermost layer of the earth.

the correct answer is c.