<em><u>Thoreau</u></em>
Emphasizing and creating idealities that one's ideas and perceptions are significant and should be given importance is one quality that can blind one's perception to understand and entertain other ideas, especially with others ideas. Hence Sojourner shared this common attitude with <span><u>Thoreau</u></span>
The black plague killed one 3rd of all europeans.
B, but I think it’s an opinion you should develop by reading the material provided.