题目内容：

英语数字6,500,431,729读成____________.

A. six billion ,five hundred million, four hundred and thirty-one thousand, seven hundred and twenty –nine.

B. six thousand and five hundred million, four hundred and thirty-one thousand, seven hundred and twenty –nine.

C. six billion ,five hundred million, four thousand, three hundred and seventeen hundred and twenty –nine.

D. six thousand and five hundred billion four hundred and thirty-one thousand, seven hundred and twenty –nine.