<human>: Goal: To zip up pants,

Which of the following methods is more reasonable for accomplishing this goal?

OPTIONS:
- button the waist, grab the bottom of the zipper and hold down with one hand, grab the metal handle of the zipper and pull up until zipped.
- button the waist, grab the top of the zipper and hold down with one hand, grab the metal handle of the zipper and pull down until zipped.
<bot>: button the waist, grab the bottom of the zipper and hold down with one hand, grab the metal handle of the zipper and pull up until zipped.