问题如下：
Following are some descriptions about the underlying rationale for a written investment policy statement (IPS), which is the most correct?
选项：
A. A written IPS is created to communicate the plan to achieve success in investment.
B. The purpose for a written IPS is to protect investment managers from client’s potential lawsuits.
C. A written IPS is created as an instruction for clients about the proper use and purpose of investments.
解释：
A is correct.
A written IPS is mutually created by clients and portfolio managers and is mainly used to help communicate investment objectives and constraints.
老师，请问这题是什么意思？
