Which of the following parts from o'henry's "the last leaf" reveals information about the conflict?

a. old behrman was a painter who lived on the ground floor beneath them. he was past sixty and had michael angelo's moses beard curling

b. 'she is very ill and weak,' said sue, 'and the fever has left her mind morbid and full of strange fancies.'

c. at the top of a squatty, three-story brick sue and johnsy had their studio. "johnsy" was familiar for johanna.

d. the ivy leaf was still there. johnsy lay for a long time looking at it. and then called to sue, who was stirring the chicken broth over the gas stove.