certain bacteria are able to digest petroleum. which of the following statements describes how humans can utilize these microorganisms to help maintain the health of the ecosystem?

What is the missing step in this proof? scroll down to see the entire proof.u

What is likely to happen if a new aggregate demand curve moves to the right? prices and output would drop, and the equilibrium point will stay the same. prices would rise, and output would drop in the short run. prices and output would rise, and the equilibrium point will change. prices would rise, and output would drop in the long run.

Show all steps i have my exam tomorrow