What role do water masses play in the distribution of global heat? A. They cause different ocean depths, with deeper ocean pockets staying warmer than shallower ocean pockets B. They make the Atlantic Ocean less salty than the Pacific Ocean. C. They create cyclones as part of the Coriolis effect to spread out water temperatures. D. They're involved in thermohaline circulation.

Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks