Elven Explorations Part I/1.4

You accept the mission, and hurry home to retrieve your materials. You grab a basic survival kit consisting of a hatchet, tinderbox, rope, and fishing pole and head out to the northeast. Soon, you find a trail up the mountains Arianywn depicted as the Arandar Pass, but you also see an innocent-looking cave on the side of the nearest mountain. Arianwyn told you to take the pass, but you're sure a tunnel through the mountains would be quicker. Which one do you take?

The innocent-looking cave that may be much quicker

The Arandar Pass, which Arianwyn told you to take