How does planning activities at your own home help you avoid situations involving alcohol? A. Your home life does not involve situations with alcohol use.
B. Alcohol use is almost always tied to group events outside the home.
с. You can control whether or not there is alcohol in your home.
D. Planning activities at home does not help you avoid situations involving alcohol.

Investigator a has biological specimens that are coded and linked to identifiers of the source individuals. investigator a provides the specimens to investigator b but does not provide the individual identifiers. investigator b agrees not to re-identify the source individuals. is investigator b's research using the biospecimens human subjects research according to the definition of human subjects research in the federal regulations?