Context: The air is a bit thin , making exercise ( like climbing mountain passes ) a bit of a challenge . We entered the basin via the Grandview Trailhead , with a 4 mile hike back to Betsy Lake where we established camp . Here 's a map of the area : We reached the trailhead at about 11:00 , when the boys decided to have their lunch before hitting the trail . We ate and put the finishing touches on our packs and took off .

Question: Why did the boys want to have lunch before continuing up the trail ?
Options:
0. They wanted to put off the hike as long as they could before starting
1. They wanted to get some fuel in before beginning the main hike
2. They had not had any breakfast yet
3. They were hungry because it was almost lunch time
Answer: 1