Read the text and determine if the sentence is true (see options at the end):

Rachel Brosnahan (born December 15, 1990) is an American actress. She is best known for her roles in the films "The Unborn" (2009) and "Beautiful Creatures" (2013) and for portraying Rachel Posner in the Netflix series "House of Cards", for which she was nominated for an Emmy Award.

Sentence: Rachel Brosnahan is best known for portraying Rachel Posner in "The Unborn".
Choices:
[a]. Yes.
[b]. It's impossible to say.
[c]. No.
[b].