Who Is Using a Cross-Sectional Research Design

Who is using a cross-sectional research design?

A) Fred,who is assessing study habits in fifth graders in three different countries
B) Barney,who is assessing the study habits in a group of fifth graders and who will follow and assess this same group when they get to eighth and then eleventh grade
C) Wilma,who is simultaneously testing the study habits of fifth,eighth,and eleventh graders
D) Betty,who is assessing the study habits of fifth graders in the year 2003,and plans to assess eighth-graders' study habits in 2004 and eleventh graders' habits in 2005