Which of the following best describes upfade in a multipath environment?
The signal is stronger than it should be because multiple signal paths are received twice at exactly the same time, which results in the multiple signals being in-phase.
The multiple signal paths are distorted and difficult to understand.
Multiple signal paths are not sent at exactly the same time. The receiver receives a positive crest on the primary signal and a negative crest on the secondary signal.
The multiple signal paths are weaker than they should be because the signals are out of phase with each other.