There has been a complete break . . . . . . . . of law and order. A. up B. off C. down D. of

The correct answer is D. of.

The word “of” is used to indicate possession or association. In this case, it is used to indicate that the break is in the law and order.

The other options are incorrect because they do not make sense in the context of the sentence.

• Option A, “up,” does not make sense because a break cannot be “up.”
• Option B, “off,” does not make sense because a break cannot be “off.”
• Option C, “down,” does not make sense because a break cannot be “down.”