Use the Decision Tree to help you solve this problem.

What decision should you make at node $4?$

Sell land $($D$2)$ because EV$($D$2|$U$)>$ EV$($D$1|$U$)$

Build office chmplex $($D$1)$ because EV$($D$1|$U$)>$ EV$($D$2|$U$)$

None of the above

Either is fine, because they both have the same EV

Cannot tell with the given information