[A] Select current sample, Collect current data on topic of interest, Locate archival data on sample regarding topic of interest, Compare data.
[B]Locate archival data on sample regarding topic of interest, Collect current data on topic of interest, Compare data, Select current sample.
[C] Compare data, Select current sample, Collect current data on topic of interest, Interview sample about past recollections concerning topic of interest.
[D] select current sample, Interview sample about past recollections concerning topic of interest, Correct current data on topic of interest, Compare data.