In WLAN scenario, for requirements collection, which of the following statements is wrong?

In WLAN scenario, for requirements collection, which of the following statements is wrong?
A . Coverage area: Confirm the key coverage areas required by the customer (such as internal offices, conference rooms, etc.) and general coverage areas (such as stairs, bathrooms, etc.)
B . Fulfill the signal field strength requirements in the area, for example, -40dBm~-65dBm in key areas, >-75dBm in ordinary areas
C . Number of concurrent users: the total number of access terminals in the current coverage area, and how many people the customer plans to access at the same time in the coverage area.
D . Bandwidth requirements: the main business types planned by the customer and the bandwidth requirements for each user

Answer: C