He ______ his old car for a new one as soon as he had won the prize.

A．living together before marriage is significant; every couple should try it
B．living together before marriage is a choice that should be respected
C．living together is the best way to bridge the gaps between a couple
D．living together is a symbol of the modem form of civilization

A．How to Use Descriptive Statistics
B．Applications of Inferential Statistics
C．The Development and Use of Statistics
D．The Drawbacks of Descriptive and Inferential Statistics