Treaking Uphill Is Much Easier On Paper Than In Real Life

Calculus Level 1

Sarah and Shane are hiking to the Great Pond Mountain in Maine. They have plotted their course (green line) in the above topographical map, which shows contour lines at intervals of 20 meters. They plan to hike from Mead Mountain, to Cove Hill and then to Great Pond Mountain, passing through Checkpoints A and B.

Which of the following routes would they experience the steepest ascent?

Image credit: Wikipedia
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