Why is the radiation so intense in the region that traces Io's orbit around Jupiter (the Io torus)?
A) Jupiter's strong magnetic field makes the radiation intense everywhere, and the region around Io is no different than any other region.
B) The region is full of gases that become ionized after they are released from volcanoes on Io.
C) Io's gravity allows this region to capture huge numbers of charged particles from the solar wind.
D) An orbital resonance between Io, Europa, and Ganymede makes the radiation intense.
Answer: B