How does carbon dioxide dissolves in blood plasma for transport?

Some of the carbon dioxide is transported dissolved in the plasma. Some carbon dioxide is transported as carbaminohemoglobin. However, most carbon dioxide is transported as bicarbonate. As blood flows through the tissues, carbon dioxide diffuses into red blood cells, where it is converted into bicarbonate.

The answer is observations and interpreting.

Carbon-14 has a half-life of 5,730 years and most igneous rock is older than that.