They all have errors, maybe the italics didn't copy correctly here is how each of the sentences should look.
A. Before he wrote his great stories and novels, the young Ernest Hemingway wrote for his school newspaper, The Flying Trapeze.
B. Victor Hugo's novel Les Misérables has been adapted for musical theater.
C. Katherine Paterson is the author of the books Bridge to Terabithia and The Master Puppeteer.
D. One of the short poems in A. A. Milne's book of children's poetry, When We Were Very Young, is "Teddy Bear."
