The answer is A, Mechanical and chemical.
Explanation:
The main cause of the crash was the long period of speculation that preceded it, during which millions of people invested their savings or borrowed money to buy stocks, pushing prices to unsustainable levels
Answer:njn
LATENT FINGER PRINT
Explanation:
Latent fingerprint are fingerprint that are made of sweat and oil on the skin's surface or finger and palm and they are not visible to the physical or naked eye, they usually require some additional process like dusting them with powder and then lifting the powder with tape that are transparent in order for them to be seen.
Investigator Jones will need LATENT FINGERPRINT to verify that there are no more fingerprints at the scene.
The answer i believe is 21<span />