In an experiment, one thousand nine-year-old children were allowed to choose whether to participate in a program in which the researchers taught them dance during the daily break from their lessons. four hundred of the children chose to participate for at least one year. at the end of the year, researchers found that the children who had participated had significantly better balance, on average, than those who had not. the researchers hypothesized that dancing resulted in a sustained improvement in the children's sense of balance.

it would be most in evaluating the researcher's hypothesis to know whether the researchers prior to having

select researchers for the phrase that fills the blank labeled 1 in the given statement, and select prior to for the phrase that fills the blank labeled 2 in the given statement to create the most accurate statement on the basis of the information provided. make only two selections, one in each column.

1: researchers | 2: prior to
0 0 tested the children's ability to dance
0 0 designed a second experiment
0 0 divided the children into the two experimental groups
0 0 tested the children's sense of balance
0 0 taught dance to the children through the dance program