The NBAC looks at characteristics individuals might have that would prevent them from being able to provide voluntary informed consent. The traits may be thought of as falling into six broad areas: cognitive or communicative, institutional, deferential, medical, economic, and social. Prospective research subjects who are not able to comprehend information, deliberate, and make decisions about participation in a proposed research study have a: Cognitive or communicative vulnerability Physical vulnerability Economic or social vulnerability Institutional vulnerability

Prospective research subjects who are not able to comprehend information, deliberate, and make decisions about participation in a proposed research study have Cognitive or communicative vulnerability.

Answer: Option A

Explanation:

Prospective research subject are those who are taken as subject for the purpose of research on the objective of prospective. When the subjects of Prospective research lack ability in some manners to make an informed choice, the incapacity demonstrated here is remarked as the Capacity-related cognitive vulnerability.

When the subject of prospective research have the above mentioned capacity, in lieu of which, because of limited ability for communication, the subject cannot communicate with researchers and the latter are not able to exercise their capacities effectively, such inability is remarked as the Communicative vulnerability.