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The answer will be C.
Since it's destructive, increase can't occur.
Since the amplitutes are same, decrease can't occur.
Since it's destructive, increase can't occur.
Since the amplitutes are same, decrease can't occur.
When two waves have the same amplitude, the two waves would completely cancel each other out.
What is a wave?
A wave is a disturbance along a medium which transfers energy. Now we know that two waves can interfer constructively or destructively.
In this case when two waves involved in destructive interference have the same amplitude, the two waves would completely cancel each other out.
Learn more about waves: https://brainly.com/question/13805601?