is (are) a greater concern when using observation because the observations are made in an manner. a.

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is (are) a greater concern when using observation because the observations are made in an manner.

a. Reactivity; undisguised; obtrusive

b. Expectancy effects; disguised; unobtrusive

c. Reactivity; disguised; unobtrusive

d. Expectancy effects; disguised; obtrusive

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