Final Answer:
The choice that violates an ethical responsibility associated with informed consent is 2. Using data obtained before the initiation of the study.
Step-by-step explanation:
Informed consent is a critical ethical principle in research involving human subjects. It entails ensuring that participants are fully aware of the study's nature, potential risks, benefits, and their rights before agreeing to participate. Option 2, using data obtained before the study's commencement, violates this principle as it compromises the voluntary and informed nature of participants' consent.
When researchers use pre-existing data without prior consent or without providing participants the opportunity to understand how their information will be used in a new study, it undermines the transparency and autonomy crucial to informed consent. This practice could lead to potential ethical breaches and erode trust between researchers and participants, impacting the validity and ethical integrity of the study.
Ethical research demands that participants have the right to know how their data will be utilized, and they must give explicit consent for its use in a particular study. Using previously collected data without informed consent not only disregards this fundamental aspect of ethical research but also fails to uphold participants' autonomy, potentially exposing them to risks they haven't agreed to, thus violating the principle of informed consent.