How many seats are there in the flight deck of a CRJ?

The flight deck of a CRJ (Canadair Regional Jet) is specifically designed to accommodate a crew of two members. This includes the pilot and co-pilot, both of whom are essential for operating the aircraft safely and efficiently. The design of the cockpit is focused on the needs of these two seats, featuring advanced avionics and controls that are accessible from both positions.

The other options suggest that there are more seats than what's typical for a CRJ, which is not accurate given its operational structure as a regional jet. Having additional seats in the cockpit would not align with standard aviation practices, which prioritize functionality, safety, and the effective management of flight tasks by a two-person crew. Thus, the correct answer reflects the specific design and operation standards for the aircraft type.