Passage: I woke up early this morning , and I decided to go to the gym . It is a 10-minute walk from my home . I put on my workout clothes , and I put on my sneakers . I picked up a bottle of water . I entered the reception area and swiped my pass . Then I turned right and went into the cardio room . There were only a few people there . I like looking out the window while I exercise . I can see a park . I walked on the treadmill for 15 minutes , and turned it off . I wiped down the machine . This completed my routine . I walked out of the building and returned home . Question: How long was the person on the treadmill? Option1: 5 minutes Option2: 15 minutes
15 minutes