Which plot would be the most effective disguise for an artist to speak out against corrupt religious leaders?

A. Song: An angel sings about a priest's interactions with a little girl who brings her kitten to church.
B. Poem: A poet writes a rhyming poem in the form of an ancient hymn but changes the words to specifically mention the injustices done by the church leaders.
C. Stage play: A group of rats lives in the church basement. The lead rat has others bring in extra cheese to help feed the poorer rat families, but then he keeps the cheese and grows fatter.
D. Movie: A church is built in a small town and several parishioners' lives intersect as they meet for services there.