You and your dog Sparkles are out on a lovely walk on a fall afternoon. You look up in the sky and see a mid-altitude layer of clouds that resemble little castles. What would be the appropriate name for these clouds

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