When assessing body composition, why should the same technique be used for pre- and post-test comparisons?
A. Some techniques yield estimates of body fat, and some yield estimates of bone density.
B. Some techniques are highly accurate, and some are usually inaccurate.
C. Some techniques measure in grams and others in ounces.
D. All the techniques are very time-consuming to set up and administer.
E. Each technique might yield slightly different values.
Answer: E
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