When analyzing the indoor coverage effect, the loss of the building is a part that must be considered. Which of the following about the loss of the building is incorrect?
A . The average penetration loss of buildings located in urban areas is greater than that of suburban and remote areas.
B . The area loss of the window is generally smaller than that of the windowless area.
C . The open loss in the building is less than the loss in the wall area with the corridor
D . The aluminum wall bracket has less loss than the non-aluminum bracket.
Answer: D