New Zealand has a population of about 3.8 million, about fourteen percent are Mori.
A. about which
B. for which
C. during which
D. of which
网友回答
A. about which
B. for which
C. during which
(答案→)D. of which
解析：考查定语从句。of which即about fourteen percent of 3.8 million，故选D。