A gray rock composed of a number of different fossilized organisms such as crinoids, trilobites, and
brachiopods, you pour some hydrochloric acid on the rock and notice that it reacts to
the acid.

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