Most studies focus on remarkably precise slivers of human emotions. One study at Allegheny University in Pennsylvania found that the tendency for a person to throw dishes or slam doors when he is angry is 40 percent heritable, （） the likelihood a person will yell in anger is only 28 percent heritable.

单项选择题Whether a policy that is good in the aggregate sense （） also good for a particular person, however, （） a different matter.

A. is； is
B. is； /
C. /； is
D. is； being

单项选择题The period in Europe from the end of the World War II has seen a spectacular growth in the number of cars, similar to （） in America during the 1920s and 1930s.

A. what would take place
B. that which took place
C. which had taken place
D. that were taking place