Compared with 2004, the number of murders in the U.S.A. in 2005 ______.

A．In our daily life.
B．In government and industry.
C．In business and universities.
D．Both A and B.

A．It’s because there are many developing nations.
B．It’s because people use too many man-made materials.
C．It’s because we have more and more industry.
D．It’s because we are building more vehicles.