问题如下：
Gary is a middle-aged doctor. Apart from living expenses, he has several plans, such as save money for travelling after retirement, buy a new house after ten years. He seeks investment advice from a portfolio manager in ABC Hedge Fund and requires to match each of his plans with different portfolio asset allocations. Gary most likely has:
选项： loss-aversion
bias.
bounded rationality.
C.mental accounting bias.
解释：
C is correct.
考点：BPT模型
解析：Gary基于目标分别做投资组合，课上说过BPT= goal based = layers = pyramid = mental accounting bias。所以选C。
mental accounting是正确的操作，为什么说它是bias呢?（听起来有负面的意思）
