arable land

A.China has a population of more than 12 million, and its land natural resources that everyone own are lower than the world’s average.
B.China has a population of more than 1.2 billion, and its land natural resources that everyone own are lower than the world’s average level.
C.There are more than 12 billion people in China, and its land natural resources per capita are lower than the world’s average level.
D.China has a population of more than 1.2 billion, and its land natural resources per capita are lower than the world’s average.

A.This is a great motive force to make China’s grain climb on a new step.
B.This is a great motive force to make China’s grain go a step further.
C.This will enable China to go a step further in grain production.
D.This will enable China’s grain production to go a step further.