Definition: You are given a question on virology. You are also given 4 answer options (associated with "A", "B", "C", "D"), out of which only one is correct. You need to answer the question by selecting the correct option. You should only answer with the choice letter, not the whole answer.
Input: The basic code of ethical research (respect for persons, beneficence, and justice) was first established by the:
(A)Nuremberg Code (B)Declaration of Helsinki (C)CIOMS (D)Belmont Report

D