Which may have been a reason for the decline of civilization in the indus valley? a. major sandstorms destroyed the crops. b. disease destroyed much of the population. c. unrelenting wars destroyed the villages. d. craftsmen and laborers could no longer make a living.

china unilaterally claims the entire south china sea as sovereign territory, then builds artificial islands to bolster its claim. it suddenly activates an air defense identification zone over the east china sea, and threatens to down any aircraft that does not report its position. it builds roads into indian territory, then redraws the maps to show that it is actually chinese territory. the people's republic under president xi jinping is quickly becoming the bully of asia.

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.