Professor yen is curious about how rapidly reading skills develop in children of ages five to ten. if he has only a limited period of time to research this question, which research design should he utilize? cross-sectional longitudinal unobtrusive cohort

Professor Yen is curious about how rapidly reading skills develop in children of ages five to ten. Professor Yen is trying to research a question in a short period of time. He should maybe use and utilize the so called cross-sectional way of researching.

Thus,

in choosing among the four choices, the right answer is the cross-sectional