Some biologists believe this is an ancie
题型：选择题
问题：
Some biologists believe this is an ancient survival strategy, ______ a diet with 30 percent fewer calories
than usual increased life span. [ ]
A. for which
B. to which
C. of which
D. in which
Some biologists believe this is an ancient survival strategy, ______ a diet with 30 percent fewer calories
than usual increased life span. [ ]
A. for which
B. to which
C. of which
D. in which