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(Choose 1 answer)
What does the concept of "demand characteristics" warn us about when applied to user testing?
A. Participants will perform differently when observed than they would if they were on their own
B. Participants are likely to tell us what they think we want to hear
C. Participants who receive monetary compensation will typically perform better on tasks than those who don't
D. Researchers shouldn't ask participants to do anything in particular, rather they should let participants decide what to do
