Which one of the following statements concerning productivity trends is best?
◦ The U.S. service sector has experienced small productivity gains, as have the service sectors of major trading partners such as Japan and Germany.
◦ U.S. productivity has been shrinking over the past three years.
◦ Japanese productivity is greater than that of the United States.
◦ The low growth in service productivity has had little effect on overall U.S. productivity.