问题如下：
Ng’s response to Kepler’s question about the most efficient portfolio management strategy should be:
选项：
A.full replication.
B.active management.
C.an enhanced indexing strategy
解释：
C is correct.
Under an enhanced indexing strategy, the index is replicated with fewer than the full set of index constituents but still matches the original index’s primary risk factors. This strategy replicates the index performance under different market scenarios more efficiently than the full replication of a pure indexing approach.
小规模的fund要担任学校的扩张和翻新，不应该active一点才能达到目的吗
