**Core Concept**
Good clinical practice (GCP) is a set of international ethical and scientific quality standards for the design, conduct, recording, and reporting of trials that involve the participation of human subjects. GCP provides a framework for ensuring the rights, safety, and well-being of trial participants.

**Why the Correct Answer is Right**
The correct answer is the one that does not follow the principles of GCP. GCP emphasizes the importance of informed consent, confidentiality, and the protection of personal data. It also requires that trials be designed and conducted in a way that minimizes risks to participants and ensures their rights are respected.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is a key component of GCP. Informed consent is a fundamental principle of GCP, requiring that participants be fully aware of the potential risks and benefits of a trial and provide their consent before participating.
**Option B:** This option is incorrect because it is a critical aspect of GCP. Confidentiality is essential in clinical trials to protect the privacy of participants and maintain trust in the research process.
**Option D:** This option is incorrect because it is a fundamental principle of GCP. The protection of personal data is a key aspect of GCP, requiring that personal data be handled securely and in accordance with applicable laws and regulations.

**Clinical Pearl / High-Yield Fact**
A key aspect of GCP is the requirement for investigators to maintain accurate and complete records of trial-related activities. This includes documentation of informed consent, participant data, and adverse events.

**Correct Answer: C**