Scientist: Recent studies regarding ambulation in toddlers have led researchers to hypothesize about a possible link between linguistic sound reproduction and an ability to walk developing within a month of demonstrating an ability to reproduce sounds, as nearly 70% of toddlers in the study who were able to reproduce sounds under consistent stimuli were observed walking independently within a month. In the table, select two pieces of information regarding the sample sizes within the study and a possible additional observation that when combined would most help to evaluate the validity of the scientific hypothesis. Make only two selections, one in each column.
Additional observation
A. Exact number of children in the study
B. Toddlers not able to reproduce sounds in the study
C. Toddlers able to reproduce sounds in the study
D. Percent observed walking independently within a month
E. Percent observed reproducing sounds in the study
F. Percent observed reproducing sounds in the study