What is the major premise behind activity$-$based costing?

The major premise behind activity$-$based costing is that a single cost driver is used to assign overhead.

The major premise behind activity$-$based costing is that it focuses on activities that occur outside of the production process.

The major premise behind activity$-$based costing is that each department is assigned the same rate.

The major premise behind activity$-$based costing is that products use activities, and activities use resources.