Which statements identify examples of moral ambiguity in the text of The Decameron? Select all that apply.

a. The reader's perceptions of Griselda's goodness are undermined by her lack of concern for her children's welfare.
b. Griselda loses all interest in her husband because he treats her poorly.
c. Gualtieri earns his wife's respect, but loses the respect of his children.
d. Characters who behave poorly are nonetheless rewarded by good fortune.