A critical activity can be shortened one day for $2,000. A noncritical activity can be shortened three days for $1,000 but has five days of float. What best supports a one-day earlier finish under these facts?

1. Evaluate crashing the critical activity for $2,000
2. Crash the noncritical activity because its cost per day is lower
3. Remove float from the report to make the noncritical activity critical
4. Add the two reductions and promise four days earlier