When a wave encounters a large gapless barrier which of the following describes what will happen

I believe when the wave encounters a large gapless barrier, the barrier will absorb some of the wave's energy. 
A wave is a periodic disturbance that propagates itself through a medium or space. When a wave encounters a barrier that is the boundary of the medium in which the wave is travelling, the wave is reflected, and the barrier may absorb some energy of the wave.

A) the enthralling of formation for pure element in its standard state is always positivehope this : )