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One study found that passengers flying on Boeing-747s preferred them to L-1011s, while passengers flying on L-1011s preferred them to Boeing-747s. This is an example of:
A. random sampling error.
B. social desirability bias.
C. administration error – sample selection error.
D. response bias.

I'm stuck on this one because it seems B and D could be the right answer. Does this automatically eliminate both from the choices?

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