False negative results in mammography occur in specific age groups because:
a. older women have greater density of breast tissue.
b. older women have less density of breast tissue.
c. younger women have greater density of breast tissue.
d. younger women have less density of breast tissue.
C
Because of the greater density of breast tissue, mammography is less sensitive in younger women, which may result in more false-negative results.
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In which section of the research report might the problem statement be located?
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