<human>: Objective: How can you make a steadying sort of rack in the back of your truck?

Which of the following solutions is more sound in terms of naive physics reasoning?

OPTIONS:
- Use either 1x3s or 2x4s, depending on how much weight you’ll need to restrain. Screw the four pieces together to fit just inside the wheel wells, as shown, with ears extending ahead of and behind the wells. Tools, sandbags and other items will stay where you want them.
- Use either 1x3s or 2x4s, depending on how much weight you’ll need to restrain. Screw the four pieces together to fit just outside the wheel wells, as shown, with ears extending ahead of and behind the wells. Tools, sandbags and other items will stay where you want them
<bot>: Use either 1x3s or 2x4s, depending on how much weight you’ll need to restrain. Screw the four pieces together to fit just inside the wheel wells, as shown, with ears extending ahead of and behind the wells. Tools, sandbags and other items will stay where you want them.