The following statement about conformity evaluation of management system is correct ().

Answer: b, d

This topic investigates the operation of occupational health and safety management system and environmental management system. Option A, correctly expressed as "Compliance evaluation is conducted at two levels: branch level and project team level"; Option C, the correct expression should be "company-level evaluation is conducted once a year". Option e, the correct expression should be "compliance evaluation at the project team level, and the project manager will organize a compliance evaluation. When the construction time of a certain stage exceeds half a year, at least one compliance evaluation should be conducted. At the end of the project, a systematic compliance assessment should be conducted for the whole project. "