Which scholar(s) were the catalysts in developing a theory of positive organizational scholarship around authentic leadership?

Which of the following describes what rocks usually are composed of ,

Which of the following is the main purpose of using an anchored network of booms which funnel debris to a collection area?

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