Roark moved like a current of air—light and invisible. He was a tall, thin figure cloaked in black. The moon shone brightly, but Roark flew from shadow to shadow past the guards, through the gate, through the courtyard, and into the emperor's palace. He was on a mission to recover the Sacred Scroll. The scroll belonged to the Ninjas of Nyu, and Roark was determined to return it to his fellow ninjas. How does the description of Roark contribute to the story?
A.
It provides evidence that ninjas are real.
B.
It makes the outcome of Roark's mission much harder to predict.
C.
It builds suspense about the Sacred Scroll.
D.
It gives the reader a mental image of Roark and his capabilities.