no, no, no
如果原文最后一句话是Therefore, the rides at traveling fairs are less safe than the rides at permanent fair without inspection
还能说得通。
这道题indicator(therefore) 后面的conclusion只是 the rides at traveling fairs are less safe than the rides at permanent fair.
The general form of an argument in a natural language is that of premises (typically in the form of propositions, statements or sentences) in support of a claim: the conclusion