Write the next sentence in the following story.

How to shorten backpack straps
Put the backpack on and adjust the straps.
The cushion on the top of the strap should rest evenly and comfortably on top of your shoulders. The backpack should not sag below your behind.

Available options:
* Additionally, the top portion of the strap must be almost perpendicular to your body. Check the straps periodically as you move between backpacks, to make sure they are not adjusting too quickly.
* Do not adjust the bottom of the strap until it is at or below the tops of your shoulders. Adjust the straps according to the outfit.
* Ensure the straps extend a bit below your hips; it should be higher than shoulder width. The front thigh straps should reach about two points above your hips.
* Instead, it should run parallel to your back when you are walking. If you notice the backpack sagging below your behind, there may be too much weight in the backpack or you may need to get a backpack that has a reinforced bottom so it does not sag.. The answer should be
Instead, it should run parallel to your back when you are walking. If you notice the backpack sagging below your behind, there may be too much weight in the backpack or you may need to get a backpack that has a reinforced bottom so it does not sag.