Click the Exhibit button. Given the following parameters: transmitter output (min): -2 dBm receiver input (min): -28 dBm 15216 Mux and Demux loss: 4.5 dB 16 channels maximum In which sites shown in the exhibit could the 15216 EDFAs be placed to minimize the number of EDFAs needed?（）

• A、Locations B, C only
• B、Locations A, B, C only
• C、Locations A, B, D only
• D、Locations B, C, D only
• E、Locations A, B, C, D