Last year the rate of unemployment was 8.2 percent, but this year it has been 7 percent. We can conclude that unemployment is on a downward trend and the rate will be even lower next year.
Which of the following, if true, most seriously weakens the conclusion above?
【选项】
Increases in hiring would cause companies to be more productive, netting them earnings that would allow them to hire yet further.
选项是否正确？