Utopianism, socialism, and captialism
for sure
The correct answer is Sir Ernest Rutherford.
One of the first findings on atomic energy theory was reached in 1911 by Rutherford, who became known as the father of nuclear physics.
He discovered that the mass of the atom was concentrated in its nucleus, and proposed that the nucleus has a positive charge and is surrounded by negatively charged electrons, which had been discovered in 1897 by J. J. Thomson.
His theory was complemented in 1913 by Niels Bohr, who placed the electrons in definite shells or quantum levels.
Ah cool!
This would be referring to the Homestead Act! They would give the land to anyone who was willing to work on or improve the land.
The land was given almost free of cost and all the new owner of the land was required to do, was work the land until it was ready for farming/crops, and then they had to build a house for themselves (and possibly their family).
The Balkan Wars is I believe the answer
The answer to your question is letter C. homo sapiens. Hope this helps.