what does it mean when a teachers adds a “excerpts in isolation” comment

Choose the best paraphrase of bashes haiku an old silent pond a frog jumps into the pond splash silence again a. the pond was silent until the frog jumped in splashing now alternates with quiet b. a pond will never be silent after one frog jumps into it and starts splashing around c. a frog jumps into a quiet pond there is a splash then all is quiet once more d. there was once an accident body of water that a frog splashed into and died