How does the statement by Mrs. Dubose in paragraph 13 propel the action in the story forward?

A
She crossed a line by attacking Jem and Scout’s father, which Jem could not ignore.

B
She used offensive words, but Jem decided that he and Scout should forgive her.

C
She had gone too far this time, and Jem attacked her while she sat on the porch.

D
She is a racist, so Jem and Scout had to stand up for what they believed was right.