Using your answer from the preceding question, the estimated average treatment effect of the training program is widehat$({}_{\text{u}\text{r}\text{a}})=|.$

Which of the following best represents the meaning of the estimated average effect of the training program?

The training program led to an increase in $1998$ earnings of $$3,200.$

The training program led to a decrease in $1998$ earnings of $$330.$

The training program led to a decrease in $1998$ earnings of $$36.$

The training program led to an increase in $1998$ earnings of $$3,000.$