Which group was most likely to be suspected of socialist leanings during the late 1800s and early 1900s?

Who were the socialist in 19th century Europe?

Karl Marx, Friedrich Engels were the socialists in 19th century Europe.

Explanation:

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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.