Christopher Columbus has come to personify

[amnesty17]

For many revisionist historians, Christopher Columbus has come to personify devastation and enslavement in the name of progress that has decimated native peoples of the Western Hemisphere.

A. devastation and enslavement in the name of progress that has decimated native peoples of the Western Hemisphere
B. devastation and enslavement in the name of progress by which native peoples of the Western Hemisphere decimated
C. devastating and enslaving in the name of progress those native peoples of the Western Hemisphere which in the name of progress are decimated.
D. devastating and enslaving those native peoples of the western Hemisphere which in the name of progress are decimated.
E. the devastation and enslavement in the name of progress that have decimated the native peoples of the Western Hemisphere.

[spoiler]OA:E[/spoiler]
[spoiler]Could you explain why B is wrong
C-which placement wrong, far from devastating and enslaving
D- same as C
A-has (devastation and enslavement) requires plural verb have
Why is B wrong[/spoiler]

[melguy]

For many revisionist historians, Christopher Columbus has come to personify devastation and enslavement in the name of progress that has decimated native peoples of the Western Hemisphere.

A. devastation and enslavement in the name of progress that has decimated native peoples of the Western Hemisphere
B. devastation and enslavement in the name of progress by which native peoples of the Western Hemisphere decimated
C. devastating and enslaving in the name of progress those native peoples of the Western Hemisphere which in the name of progress are decimated.
D. devastating and enslaving those native peoples of the western Hemisphere which in the name of progress are decimated.
E. the devastation and enslavement in the name of progress that have decimated the native peoples of the Western Hemisphere.

OA:E
Could you explain why B is wrong

The placement of which is incorrect here. 'Which' can refer to only a noun immediately preceding it.
e.g. I am going to check out the new store, which opened last week.

[amnesty17]

Hi
But the OA : E, has 'that' which also refers to Noun: 'devastation and enslavement ' as 'which' does in B
Also in the name of progress can be moved anywhere. I am still not clear why B is wrong