WHICH SENTENCE IS TRUE

13. Which sentence is True?

A. In 1990, there are about 6 billion people all over the world.

B. Population growth in the 21

st

century was more than that in the 20

th

century.

C. The world’s population is dramatically decreasing.

D. Population growth in the 20

th

century was more than that in the 21

st

century.