Restrictive information is the one that helps to identify a noun and make it different from the rest. In a sentence, restrictive information helps to identify the subject or doer of the action, and it helps to avoid ambiguity. This kind of information does not need to have punctuation. Moreover, a complete sentence includes the subject and the verb without any punctuation that can cause fragments. Therefore, the correct answer is B: People who disobey traffic laws put others at risk.