One consequence of the Columbian Exchange was ... trade became less possible between countries on each side of the Atlantic.
o native people in the Western Hemisphere were less likely to be exploited.
O new crops and animals were shared between the Eastern and Western Hemispheres.
O most trade continued to be between Europe and Asia

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.

d. it spread christianity. i just took the test and got it right.

answer: born in saint-dié, in the vosges department, france, he studied law, and was called to the bar at paris in 1854,[2] but soon went into politics, contributing to various newspapers, particularly to le temps. he attacked the second french empire with great violence, directing his opposition especially against baron haussmann, prefect of the seine department. a series of his articles in le temps was later republished as the fantastic tales of haussmannlaxupa (1868).[2]

explanation:

1.d 2.a c.!