案例分析题 "If we take two unrelated people at random from the population" (Para. 2) means if we （）.

A．the percentage of successful treatments is very high when present methods are used
B．the present treatment is very cheap
C．the cloning technology costs less time and money in treating infertility
D．the cloning technology is more suitable for treating infertility than leukemia

A．how the supermarket has replaced the old general store
B．how the old-fashioned general store is fast disappearing
C．how supermarket managers run modern supermarkets
D．how supermarket managers deal with problems every morning