Harold was shopping in the sporting goods department of a Wal-Mart store. There was one employee in the department at that time. In the front of the sporting goods section, in the store's main aisle (which the employees referred to as "action alley"), there was a large display of stacked cases of shotgun shells. On the top of the cases were individual boxes of shells. Shortly after the sporting goods employee walked past the display, Harold did so, but Harold slipped on some loose shotgun pellets that littered the floor near the display and fell to the floor, severely injuring his legs and back. Harold sued Wal-Mart for negligence. Wal-Mart is:

1. liable because Harold was injured in its store.
2. Liable because Wal-Mart should have known about the dangerous condition
3. Not liable because it used all due care to find dangerous conditions and guard against them.
4. Not liable because Harold was a trespasser.
5. None of the above.