ANSWER ASAP! Why was Greer Country originally excluded from the Oklahoma Territory?
A. The land was claimed by American Indians.
B. The land was claimed by freedmen.
C. The land was claimed by Spain.
D. The land was claimed by Texas.

D. The land was claimed by Texas.

Explanation:

Result of the Adam-onis Treaty of 1819 between Spain and the US. Texas became independent of Spain in 1821 and Mexico in 1836. Texas was annexed by the US in 1945. Texas and the US vied for land ownership. Organic Act of 1890 awarded the area to Oklahoma Territory.

So Oklahoma got the land later through the Organic act basically.

radioactive dating, also known as  radioisotope dating  is a process that in  estimating the approximate  age  of  rocks. these data can be analyzed from  the studies dealing with the  decay of the radioactive elements that are present in these rocks. in nature, there are a few types of materials or atoms which are quite unstable and they spontaneously decay or breakdown to form other kinds of atoms.