A Police Detective Has Just Received a List of Evidence

A police detective has just received a list of evidence collected at the scene of a murder which occurred in the victim's bedroom, which includes:
•Several blood samples were recovered from the area where the victim bled to death
•Bullets were recovered from the wall behind the victim's body
•Fingerprints found on a window that appeared to be the point of entry Which of these would be the best way to start analyzing the blood?

A) DNA testing because it is the most accurate.
B) DNA because the sample will deteriorate if not tested immediately.
C) ABO blood test because it can be done quickly and can be used to eliminate suspects.
D) Blood alcohol tests because the alcohol is rapidly absorbed into circulatory system.