Answer:
3. Current market value of the building
Explanation:
The initial cost of the building is a sunk cost.
The alternatives apparently before CrossTown Builders today:
- Modelling the building into apartments, and renting the apartments,
- Selling the building.
If it opts for the first alternative, it loses the opportunity of selling the building for cash flows of $ 1.9 million today. Therefore $ 1.9 million would represent the cost of the opportunity foregone.