Factors other than the survey by itself can influence responses. For example, the gender or ethnicity of the interviewer may influence participants. These factors are known as:

A. reliability factors.
B. internal factors.
C. extraneous factors.
D. validity re-test factors

C. extraneous factors.

Explanation:

Factors other than the survey by itself can influence responses. For example, the gender or ethnicity of the interviewer may influence participants. These factors are known as: extraneous factors. They are unwanted factors in research which could negatively influence/confound the data of a study if not accounted for. All other factors that could contribute to the study data/result other than the factors in consideration are extraneous factors.

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