In context, which is the best replacement for “to permit this kind of behavior” in sentence 5?

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Questions below are based on a draft of an editorial in a school newspaper.      (1) Over the last few years, misbehavior among students has become more and more of a problem. (2) Incidents such as vandalism, bullying, and fighting has become increasingly common. (3) The classes of the teachers are constantly being disrupted by unruly students. (4) Many students are being disrespectful to his or her peers, elders, and others. (5) To permit this kind of behavior is completely unacceptable, and we firmly believe that something must be done about it immediately.      (6) We believe that the... Show more

In context, which is the best replacement for “to permit this kind of behavior” in sentence 5?