NO.PZ2022120703000007
问题如下：
Which of the following is a minimum requirement for signatories of the Principles for Responsible Investment (PRI)?
选项：
A.Implementation of a responsible investment policy must be monitored by external parties
B.Senior-level commitment and accountability mechanisms for responsible investment implementation must be in place
C.The investment policy that covers the firm’s responsible investment approach must apply to all assets under management
解释：
B is correct?because the three requirements include that "senior-level commitment and accountability mechanisms must be in place for responsible investment implementation."
A is incorrect because "internal or external staff … may be responsible for implementing responsible investment policy" is the correct description of this minimum requirement.
C is incorrect because it is required that the "investment policy that covers the firm’s responsible investment approach … must cover >50% of assets under management (AUM)."
题干和选项，请出一个完整的中文翻译
