【单选题】

The word "Okay" is known and used by millions of people all over the worlD、Still, language experts do not agree on where it came from.

Some say it came from the Indian peoples. WhenEuropeans first came toAmerica they heard hundreds of different Indian languages. Many were will developeD、
One tribe especially had a well developed language. This was theChocktaw tribe. They were farmers and fishermen whole lived in the rich Mississippi valley in what is now the state ofAlabamA、When problems arose,Chocktaw leaders discussed them with the tribal chief. They sat in a circle and listened to the wisdom of the chief.
He heard the different proposals, often raising and lowering his head in agreement, and saying, "Okeh," meaning "it is so."
The Indian languages have given many words toEnglish. Twenty four of theAmerican States almost half, have Indian names, Okalahoma, theDakotas, Idaho, Wisconsin, Ohio and Tennessee, to name a few.And the names of many rivers, streams, mountains, cities and towns are Indian.
However, there are many people who dispute the idea that "Okay" came from the In di ans. Some say the PresidentAndrew Jackson first used the word "Okay." Others claim the word was invented by John JacobAstor, a fur trader of the late 1700s who became one of the world’s richest men. Still others say a poor railroad clerk made up this worD、His name was Obadiah Kelly and he put his initials(首写字母), O.K. on each package people gave him to ship by train.
So it goes, each story sounds reasonable and official.
But perhaps the most believable explanation is that the word "Okay" was invented by a political organization in the 1800s. Martin VanBuren was running for President.A、group of people organized a club to support him. They called their political organization the "OkayCluB、The letters "O" and "K" were taken from the name of VanBuren’s hometown, the place where he was born, old Kinderhook, New York.
There is one thing about "Okay" that the experts do agree on: that the word is pureAmerican and that it has spread to almost every country on earth.
There is something about the word that appeals to peoples of every language. Yet, here inAmerica it is used mostly in speech, not in serious writing. In recent time, "Okay" has been given an official place in theEnglish language.But it will be a long time beforeAmericans will officially accept two expressions that come from "Okay." There are "Oke" and "Okeydoke".
______different opinions as where the word "Okay" came from are mentioned in the text.A．Four
B．Five
C．six
D．Three