In accordance with the Belmont Report, obtaining voluntary informed consent from subjects prior to enrolling...

TheBelmont Report (1979)establishedthree key ethical principles:

Respect for Persons:Requires informed consent, recognition of autonomy, and protection of vulnerable individuals.

Beneficence:Obligation to maximize benefits and minimize harm.

Justice:Ensuring fairness in subject selection and distribution of research burdens/benefits.

Voluntary informed consent embodiesRespect for Persons, as subjects are given adequate information and freedom of choice. “Do no harm” (A) is a Hippocratic principle but not Belmont terminology.

Thus, the correct answer isB (Respect for persons).