A Cross-Sectional Study Is _______________

A cross-sectional study is _______________.

A) any study that examines information on many cases at one point in time
B) any research that examines information from many units or cases across more than one point in time
C) longitudinal research in which information can be about different cases or people in each of several time periods
D) longitudinal research in which information is about the identical cases or people in each of several time periods