Experimenter Bias Can Threaten Both Internal and External Validity Because

Multiple Choice

Experimenter bias can threaten both internal and external validity because the results obtained in a study

A) may be specific to an experimenter with a certain set of characteristics.
B) may be specific to the experimenter who has the expectations.
C) may be specific to the cues about how to behave.
D) may be specific to the participants' knowledge that they are being measured.