Final answer:
The three derogatory acts against professional codes based on the reference are plagiarism, cheating, and misrepresentation of facts. These acts can be avoided with careful research and writing, and professional organizations have put codes of ethics in place to maintain the integrity of their fields.
Step-by-step explanation:
Regarding the three derogatory acts to all professions mentioned in the professional code, options like dishonesty, incompetence, and misrepresentation or fraud, negligence, discrimination do not directly match the provided reference information. However, based on the information given, acts such as plagiarism (presenting someone else's work as your own), cheating (getting an unfair advantage in a test), and misrepresentation of facts (distorting the truth or your data) are all serious offenses against professional codes of conduct. Encouraging or helping anyone else commit these acts is also considered a violation of professional ethics.
To maintain ethical standards, it is important for professionals to engage in careful research and writing practices to avoid unintentional plagiarism. Professional organizations, like the Institute of Electrical and Electronic Engineers Computer Society (IEEE-CS), enforce codes of ethics which include these and other provisions to uphold the integrity of their fields.