The correct answer should be additionally.
The word additionally would provide the best transition between these two sentence. It is so because you have one idea in the first sentence, and then you want to show another idea very similar to the first one in the second sentence. Using additionally to convey that is the way to go.
It's probably B, cause and effect
Thoreau, an important Transcendentalist, believes that people need to live an honest life. This can be applied to McCandless because he lived a few years of his life with nearly nothing. He disposed of all of his possessions because he simply thought they were unimportant in life.
I hope this helps you.
Capulet doesn't care about Juliet. He believes Juliet should face her decisions and what she has done.
I think, idk