Which of the following documents outlines aeronautical engineering practices in Europe?

The correct answer is EASA regulations, which stands for European Union Aviation Safety Agency regulations. These regulations are specifically developed to ensure the highest levels of safety and environmental protection in European civil aviation. EASA's regulations cover various aspects of aeronautical engineering practices, including aircraft design, production, maintenance, and certification.

The standards established by EASA are critical for manufacturers, operators, and regulatory bodies within the European Union. They standardize safety procedures and technical specifications to ensure that all aeronautical engineering practices align with European safety requirements. This regulatory framework is essential for maintaining consistency and safety across the aviation industry in Europe.

The other options refer to different governing bodies or documents that do not pertain specifically to European aeronautical practices. For instance, FAA guidelines relate to the Federal Aviation Administration in the United States and are relevant for U.S. aviation standards. The Aero Code of Conduct and the Aeronautical Standards Manual might address certain ethical or operational aspects but are not formal regulatory documents like EASA regulations that provide comprehensive guidance on engineering practices.