Final answer:
Jen's character in 'Among the Hidden' is defined by her strong desire for freedom and equality, demonstrated through her actions such as planning a rally for the rights of third children, and not by fear or conformity.
Step-by-step explanation:
In Among the Hidden by Margaret Peterson Haddix, Jen's perspectives and actions are indicative of her personal beliefs and desires. The character of Jen is portrayed as someone who is frustrated with the limitations imposed on her life due to being a third child in a society that allows only two children per family. Therefore, the answer to the question “In Among the Hidden, what does Jen think or feel that allows you to understand who she is?” is b) Jen's desire for freedom and equality. This choice is reflected in Jen's behavior and initiatives, such as planning a rally for the rights of third children, which reveal a character who is bold and determined to challenge the status quo for a fairer society. Unlike options a) and c), which suggest fear and conformity, Jen is characterized by her resistance to oppressive laws and her active fight for change. Hence, option d) insufficient information to determine is also dismissed as the narrative provides ample evidence of Jen's character through her desire for equality and resistance to hiding away from the society that deems her existence illegal.