How many flight attendants are assigned to the CRJ 550?

The CRJ 550 is designed specifically for regional travel and has a relatively small passenger capacity, typically accommodating around 50 passengers. Consequently, it is equipped with one flight attendant to manage the cabin service for all passengers. This arrangement ensures that the flight crew can maintain operational efficiency while providing adequate safety and service to passengers on smaller regional aircraft.

The other choices suggest a higher number of flight attendants than necessary for an aircraft of this size. A designation of two or more flight attendants would generally be reserved for larger aircraft where passenger capacity and the need for more extensive service demands multiple crew members. Thus, having one flight attendant is appropriate given the CRJ 550's operational scale and service requirements.