The correct answer is A) date and result of each rated load test. The Master or person in charge of a MODU (Mobile Offshore Drilling Unit) is required to ensure the crane record book shows the date and result of each rated load test. This is in accordance with regulations governing the operation and maintenance of cranes on MODUs. The crane record book is an important log that documents the performance and safety of the crane, and the rated load test results are a critical piece of information that must be recorded. The other options are incorrect because they do not fully meet the regulatory requirements for the crane record book. The time of day (B), the name of the crane operator (C), and an entry each time the crane is used (D) are not the specific information that must be documented per the applicable regulations.