As a consequence of the Dawes Act, by 1900, American Indians

O had gained more land than they held in 1881.
O had lost half the land they held in 1881.
had lost all of the land they held in 1881,
O had kept all of the land they held in 1881,

O Had lost half the land they held in 1881.

Explanation:

The Dawes Act of 1887 was passed by the government of the United States to make native Indians more included in the government and also to possibly open their lands for more white settlers. This law requires the Indian lands to be individualized and distributed among the owners.

What this law led to was that the Indians refused to give up their lands. Moreover, to be included in the citizenship of the nation, they had to 'offer' their lands. This means that only those who accepted the individual plots were granted citizenship, thereby excluding the majority of the American Indians. This resulted in the loss of half of the lands that they had held in 1881.

Thus, the correct answer is the second option.

the answer to your question is a. the salt plains

in 1811, he led an expedition, known as the george c. sibley expedition, to improve relations with the pawnee and kansa tribes, and also to locate the rumored jefferson's salt mountain