Accuracy Is One of the Criteria to Evaluate Secondary Data

Accuracy is one of the criteria to evaluate secondary data. While using this criterion,

A) researchers need not worry about what is actually measured.
B) the researcher must evaluate the overall procedure for collecting the data.
C) researchers must keep in mind that the data were collected to answer a different set of research questions than the ones at hand.
D) the data must be carefully evaluated on how it relates to the current research objective.
E) the researcher must determine the underlying motivation or hidden agenda, if any.