Choose one sentence that has the same meaning as the root one:
They say that the world's population reached over 6.70 billion in February 2008.
A. Because of what they say, the world's population reached over 6.70 billion in February 2008.
B. It is said that as much as 6.70 billion people lived in the world in February 2008.
C. The world's population is said to have reached over 6.70 billion in February 2008.
D. It was in February 2008 the world's population reached over 6.70 billion .