State public health officials sponsor a screening campaign for diabetes in two counties. They are somewhat disappointed,

[answerhappygod]

State public health officials sponsor a screening campaign for
diabetes in two counties. They are somewhat disappointed, however,
when they discover that the individuals most likely to go through
screening had lower weight and were generally healthier than their
county surveillance statistics showed. These officials were
concerned about:
Group of answer choices
Reliability of the test
Selection bias
Poor predictive value positive of the test
Information bias
Confounding by obesity