Directions: The following sentences test correctness and effectiveness of expression. Part of each sentence or the entire sentence is underlined; beneath each sentence are five ways of phrasing the underlined material. Choice A repeats the original phrasing; the other four choices are different. If you think the original phrasing produces a better sentence than any of the alternatives, select choice A. If not, select one of the other choices.

Because cows often need to survive on low quality food, they need a way to extract maximum nutrition from the food they eat before being excreted, and therefore, cows have a special stomach called rumen in which food is repeatedly masticated and chewed.

they need a way to extract maximum nutrition from the food they eat before being excreted, and therefore, cows have a special stomach called rumen in which food is repeatedly masticated and chewed

they need a way to extract maximum nutrition from the food they eat before it being excreted, and therefore, cows have a special stomach called rumen in which food is repeatedly masticated and chewed

they need a way to extract maximum nutrition from the food they eat before being excreted, and therefore, cows have a special stomach called rumen by which food is repeatedly masticated after being chewed

they need a way to extract maximum nutrition from the food they have eaten before it is excreted, and therefore, cows have a special stomach called rumen in which food is repeatedly masticated after being chewed

they need a way to extract maximum nutrition from the food they eat before it is excreted, and therefore, cows have a special stomach called rumen in which food is repeatedly masticated after being chewed