The correct answer is B) "that activity can be justified by no one".
That is the only option written in formal English, as it uses correct grammar and standard English. The other sentences use informal language, as they are written the way they would be spoken: "know more and more", instead of "increasingly more", for example.
Suzuki uses rhetorical questions and passionate language to connect with the audience in both versions. However, she also uses a passionate tone of voice and eye contact to connect in the video.
