Step 1: Understanding intellectual property violations.
Intellectual property rights can be violated through various means, such as unauthorized copying, use, or distribution of protected works. Violations can occur due to copyright infringement, trademark infringement, or even plagiarism.
Step 2: Evaluate each option.
- Option (A) Copyright Infringement: Copyright infringement occurs when a copyrighted work is used without permission, which is a violation of intellectual property rights.
- Option (B) Patent: A patent can be violated if an invention is used or sold without authorization from the patent holder, making it a violation.
- Option (C) Trademark Infringement: This occurs when a registered trademark is used without permission, violating the trademark owner’s rights.
- Option (D) Plagiarism: Plagiarism involves using someone else's work or ideas without proper attribution, which is also a violation of intellectual property rights.
Step 3: Conclusion.
All the listed options are valid causes for violating intellectual property rights.
Final Answer:
\[
\boxed{\text{All of the options are correct, making the correct answer (A), (B), (C) and (D).}}
\]