问题如下：
Devin, Egbert, and Humphrey, financial analysts from the same investment firm, gave the following personal insights on sector indices:
Devin:Sector indices track different economic sectors and cannot be aggregated to represent the equivalent of a broad market index.
Egbert:Sector indices provide a means to determine whether an active investment manager is more successful at stock selection or sector allocation.
Humphrey:Sector indices apply a universally agreed upon sector classification system to identify the constituent securities of specific economic sectors, such as consumer goods, energy, finance, health care.
Whose statement is most correct?
选项：
A.Devin.
B.Egbert.
C.Humphrey.
解释：
The Sector Index provides a way to determine whether an active investment manager is more successful at stock selection or asset allocation.
老师，答案里面说的是Asset allocation，但B说的是Sector allocation。这一样吗？
