This is A. True
An image usually represents something with denotative (descriptive, literal) meaning, while symbols usually represent something more complex and are used in metaphors and allegories.
Mama's decision to give quilts to Maggie has a development on the plot by creating the rising action. Mama can see that Maggie really wants and deserves the quilts.
Hope that helps you
The answer is 'by not fulfilling expectations'. The other options don't really surprise the reader, and if the plot is going into one direction, and then what you'd expect to happen doesn't actually happen, you are surprised, and the element of irony is achieved.
Will it be beastiary? (beast fable)