What Is the Suggested Guideline for Decisions Regarding the Timeliness

What is the suggested guideline for decisions regarding the timeliness of research?

A) Data collected in the past thirty years are likely current.
B) If the research is sequential, the time frame for collection is irrelevant.
C) As long as the cultural context is taken into consideration as well as random assignment of subjects, the data can still be considered "fresh," regardless of time
Frames.
D) It depends upon the type of data and the process involved.