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the major flaw in cross sectional research is the virtual impossibility of A. selecting subjects who are similar in every aspect except age B. tracking all subjects over a number of years C. finding volunteers with high IQ’s D. testing concept mastery

/in /by

the major flaw in cross sectional research is the virtual impossibility of

A. selecting subjects who are similar in every aspect except age
B. tracking all subjects over a number of years
C. finding volunteers with high IQ’s
D. testing concept mastery

 
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