Read this excerpt from ''A Quilt of a Country'' by Anna Quindlen.

There is that Calvinist undercurrent in the American psyche that loves the difficult, the demanding, that sees mastering the impossible, whether it be prairie or subway, as a test of character, and so glories in the struggle of this fractured coalescing.

What is a central idea of this excerpt from the text?
a. Americans make things too complicated on purpose.
b. Americans like to see other Americans struggle.
c. Americans enjoy that being an American is a challenge.
d. Americans have problems caused by religious ideas.