The correct process of the WLAN network planning is:

The correct process of the WLAN network planning is:
A . Demand collection → pre-sale network planning → customer exchange quotation → detailed site survey → after-sale network planning
B . Demand collection → Pre-sale network planning → Detailed site survey → After-sale network planning
C . Demand collection → customer exchange quotation → detailed site survey → after-sales network planning
D . Demand collection → Pre-sale network planning → Customer exchange quotation

Answer: A