Refer to the exhibit. The signal transmitted from the AP is reflected off a wall resulting in multipath  interference at the client end.  Which statement is true？ （）

• A、 The transmitted signal from the AP arrives at the client at slightly different times resulting in  phase shifting.
• B、 If signal 2 is close to 360 degrees out of phase with signal 1， the result is essentially zerosignal  or a dead spot in the WLAN.
• C、 Multipath interference is less of an issue when using a DSSS technology because multipath is  frequency selective.
• D、 If signal 1 is in phase with signal 2， the result is essentially zerosignal or a dead spot in the  WLAN.
• E、 Multipath interference is solved by using dual antennas.