Which of the following is true about DNA database searches when a police department has received funding to test (or re-test) all of their "cold cases"?

A) DNA database searches are only useful for recent cases, not cold cases.
B) DNA database searches can be used to potentially identify suspects or link cases in cold case investigations.
C) Cold case DNA testing is not funded by police departments.
D) DNA database searches are not relevant in solving cold cases.