I need help asap there is 7 minutes left (marking as brainliest)

Can someone list any possible solutions to air pollution ?

The nations of indochina a. share a common langauge b. share a common history c. share a common religion d. none of the above

__ has (or have) been one of the most common pull factors of migration within the united statesa. lack of humanityb. gamblingc. seafoodd. well paying jobs