Since deciding to use a new training program for recently hired accountants, Office C has noticed a significant improvement in accounting accuracy over the past year. It is clear that the new training program is the cause of this improved accounting accuracy. Which of the following statements, if true, would most strengthen the above argument?
1) After completing the training, one of the accountants suggested a new financial review tool, which has helped increase accounting accuracy in the office.
2) Office C has also seen a significant reduction in the amount of time it takes to train new accountants.
3) Other offices at the same agency are planning to use the new training program.
4) A survey of accountants who have completed the training program showed that participants learned a new skill and evaluated the instructor favorably.
5) Several other offices have also found improved accounting accuracy associated with the new training program.