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:. A. Cognitive or communicative vulnerability B. Physical vulnerability C. Economic or social vulnerability D. Institutional vulnerability

Prospective research subjects who are not able to comprehend information, deliberate, and make decisions about participation in a proposed research study have a:

According to the given question, we are asked to show what type of vulnerability that would prevent people from providing voluntary informed consent.

As a result of this, we can see that the prospective research subjects who are not able to comprehend information, deliberate, and make decisions  have a cognitive or communicative vulnerability.

Therefore, the correct answer is option A

Read more here:

link

Cognitive or communicative vulnerability

Explanation: An individual or participant maybe hindered by intellectual or language limitation which could impede such individual's or participant's ability to make informed decision or choices resulting from inability to either read through, comprehend, understand the documentation of a research study or design. Participants with cognitive or communicative vulnerability lack the mental or communicative prowess required to deliberate, provide voluntary consent based on inferred information from studying or reading through a proposed research design or study.

wheres the question? imao