Answer:
In order to be MOST precise in meaning, the underlined phrase labeled (1) should be changed to :
D) the U.S. government moved many Cherokees west to a territory that is now the State of Oklahoma.
Explanation:
The question is not complete since it does not provide the excerpt with the phrase to be substituted, here is the paragraph:
About 200 years ago the Cherokee Indians were one tribe, or "Indian Nation" that lived in the southeast part of what is now the United States. During the 1830s and 1840s, the period covered by the Indian Removal Act, many Cherokees were moved west to a territory that is now the State of Oklahoma.
The use of an active sentence emphasizes the fact that Cherokees did not move voluntarily from their land, they were forced by the U.S. Government as they were applying a new law, this gives a clearer idea of who were the active subject in this situation and that the Cherokee just had to accept what they were told to do.