What is the maximum operating speed for deploying the CRJ 200 landing gear?

The maximum operating speed for deploying the CRJ 200 landing gear is 250 KIAS. This limitation is critical for ensuring safe operation during landing gear extension because deploying the gear at speeds greater than this could potentially cause mechanical failure or structural damage to the landing gear mechanism due to excessive aerodynamic forces. This speed limitation reflects the design considerations and safety factors that engineers incorporate to maintain the integrity of the aircraft systems. By adhering to this limit, pilots can ensure that the landing gear can extend smoothly and reliably, allowing for safe landings under a variety of conditions.

The other options represent speeds that exceed the maximum safe deployment speed, which would not only increase the risk of mechanical problems but also violate operational safety protocols. Therefore, 250 KIAS is the correct choice for the maximum operating speed during the deployment of the landing gear on the CRJ 200.