There has been the fear () the world will become too crowded to accommodate so many people.

A. everyone is born the same in the ability of learning
B. genes can not affect people’s performance in learning
C. there are some genes which make people learn better
D. genes are decisive factors for learning better

A. more children than woman became victims of domestic violence
B. children victims of domestic violence were previously neglected
C. 275 million children in the US suffer from domestic violence each year
D. children victims have organized a secret society of sufferers