What theme passage illustrates the muckraking theme in the jungle?

This passage illustrates the muckraking theme: "Any man who knows anything about butchering knows that the flesh of a cow that is about to calve, or has just calved, is not fit for food. ...it was the law that cows of that sort came along with the others, and whoever noticed it would tell the boss, and the boss would start up a conversation with the government inspector, and the two would stroll away."