Read the given passage and answer the questions that follow.

In a study, the University of Colorado in Denver observed a group of nurses who visited pregnant mothers. After the women gave birth, the nurses made approximately twenty visits before the children turned two years old. When the benefits to the children were studied, the researchers found that the children were emotionally less vulnerable to fear. The children learned languages sooner. They also had higher mental development scores than the control group without the nurses’ support. The benefits to the children because of this simple intervention of the nurses’ support were observed even fifteen years later.