Pls help major test so no guessing☺️

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.

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Scientists observed a rock stratum with fossil. if mollusks evolved before arthropod, where will their fossils be found.