Your project team works in two different buildings across the city.
The team has been struggling to perform effectively and has a difficult time resolving problems.
What would be the BEST team development technique to resolve this issue?
A. Mediation
B. Rewards
C. Co-location
D. Training

Correct Answer is C.
Co-location is an organizational placement strategy where the project team members are physically moved or placed next to one another to improve communication, working relationships and productivity.
PMBOK 6th Guide Page 340.