Why do we believe that the presence of methane in titan's atmosphere probably means that it is geologically active?
a. sulfur compounds in magna reacts with the rocks in the ground to produce methane.
b. methane is easily destroyed by ultraviolet photons coming from the sun.
c. methane is easily destroyed in the hot atmosphere of titan.
d. the only known source of methane on solar system bodies is from volcanism.

D. The only known source of methane on solar system bodies is from volcanism.

Explanation:

a mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. this uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.a geomagnetic reversal is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.