The sun generates energy by nuclear fusion. which of these choices best describes what happens during the process of nuclear fusion in the sun?
a: helium is fused to form carbon. b: dark spots form on the sun’s surface. c: atomic nuclei combine to form a larger nucleus. d: gas atoms lose electrons to become smaller atoms.

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