B adjective phrase is the correct answer
I think that its A. to show how determined and committed Curie was to science
In Ain't I a Woman by Sojourner truth she argued for equal voting rights because she lived and was subjected to the same treatment as the men.
<h3>Summary of
Ain't I a Woman</h3>
According to her she gets worked up like a man and is also made to be beaten like a man, therefore she should have the same rights as the man.
The whole logic of inequality made very little sense to her.
The reason that Sojourner Truth gave here was a valid one. She said that based on the fact that she was also subjected to harsh realities as the men then they are equal and she should not have to be treated less.
Read more on Ain't I a Woman here:
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Credibility is one of the declaration that appeals to ethos. For example trying to prove something and using facts