Directions: The following sentence tests correctness and effectiveness of expression. Part of the sentence or the entire sentence is underlined; beneath the sentence are five ways of phrasing the underlined part. 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. Child behaviorists contend that the behavior of children can usually be modified to make them calmer and friendlier.

Child behaviorists contend that the behavior of children can usually be modified to make them calmer and friendlier.

That the behavior of children can usually be modified to make the children calmer and friendlier is the contention of child behaviorists.

Child behaviorists contend that modifying their behavior can make children calmer and friendlier.

Child behaviorists contend that the behavior of children can be made calmer and friendlier by modifying the children.

Child behaviorists contend that the behavior of children can usually be modified to make the children calmer and friendlier.