Which quote from “Borders” best describes the reason the mother and son slept in their car?

Question

a. “We sat out under the stars the night, and my mother all sorts of stories.”***
b. “Laetitia had a lot of pride, and so did my mother.”
c. “When she was still at home, Laetitia would go on and on about Salt Lake City.”***
d. “After a week or so, I got bored and wasn’t at all sad when my mother said we should be heading back home.”

I am not sure between a and c.

Answer 1

Why are they stopped at the border? Why is the mother refusing to say she is Canadian or American? Is she proud of being Native? What's the point of this story?