In a Perfect Test-Retest Reliability,in Which a Respondent Is Asked

In a perfect test-retest reliability,in which a respondent is asked a series of questions and then is asked the same set of questions after a period of time has passed,_____.

A) the responses vary every time
B) a correlation of around .50 exists between the two sets of responses
C) the responses vary because of memory lapses
D) a correlation of 1.0 exists between the two sets of responses

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