Which of the following is the best example of a parent striving to use positive discipline with their child? A. A parent builds a fence around the swimming pool in the yard.
B. A parent models appropriate behavior when frustrated.
C. A parent tells the child they do not deserve a hug after poor behavior.
D A parent reads to the child every night before bed.​

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?