Which description is an example of direct characterization?
A. The puppy shivered uncontrollably as he entered the veterinarian's office.
B. Dana gazed lazily out the window as her chemistry teacher handed out the semester exam.
C. The actress waltzed onto the stage without even glancing at the thousand-member audience.
D. Amir had a laugh that would bubble through the room, infecting those around him with giggles.