What did the Magdeburg experiment demonstrate about air pressure that the horses could not get sufficient traction to pull the hemispheres apart

that atmospheric pressure on the earth's surface has tremendous force

that the vacuum inside the two attached hemispheres has tremendous suction

that horses are not intelligent enough to understand how to defeat atmospheric pressure

What is the best conclusion based on this data? the hypothesis was not supported because the data indicated that fertilizing plants does not improve plant growth. the hypothesis was supported; to get the best growth, use 5 milliliters of fertilizer per plant. the hypothesis was not supported; the data indicated that too much fertilizer can inhibit plant growth. the hypothesis was supported; to get the best growth, use 15 milliliters of fertilizer per plant.