At the end of the story, Sue reveals... A
that Mr. Behrman left Johnsy his money in his will.
B
that Johnsy was never in danger of dying and that it was
all in her head.
©
that the leaf actually fell, but Behrman painted a leaf to
keep Johnsy alive.
D
that the leaf is gone, but Johnsy hallucinated that it was
still there.

At the end of the story, Sue reveals that the leaf actually fell, but Behrman painted a leaf to  keep Johnsy alive.

Explanation:

From the book The Last Leaf, Johnsy is gravely ill with pneumonia and is in the hospital where she has no will to live and is willing to die.

Johnsy is counting the leaves on an ivy vine as they fall off and she concludes that when the last leaf falls, then she must die but Sue calls Behrman a painter and he paints an ivy leaf and because of that Johnsy is kept alive because she had something to look forward to, a will to live.

i'm pretty sure it is 1) wants to hide her true feelings about robert. i'm sorry if it is wrong. good luck! : d

op: object of preposition