Extra food and water
Sunglasses and sunscreen
Magazines to read
All of them are equally important.
None of the items should be carried.
To ensure the nearest McDonalds can be found.
So you can orientate yourself by using terrain association, resection, etc. to better your chances of self-rescue.
So you can shake a tree and look on the map to find yourself.
To point you to dry wood and to use as fuel for a fire.
None of the above.
Extra map to use in Yosemite National Park.
A sandboard for sandsurfing.
A, B, and C.
Extra water for hydration.
First aid kit/map/string
Whistle/map/first aid kit/survival blanket
Take shelter under a tree
Run to descend as quickly as possible
Catch up with hikers within the group
stay calm and wait until the next clear interval to continue your hike
Hikers are happier.
Hikers are more caring.
Hikers have better relationships.
Here's an interesting quiz for you.