Sentence Correction (SC) | Re: Youth beauty pageants, in which contestants as young as five years

BetweenC andD :

C. as young as five years old strut, sashay, and preen in front of a stable of judges -->Parallelism and Correct Idiom

D. as young as five years oldare strutting ,sashaying, and are preening themselves before a stable of judges... followed byhave aroused concern -->Incorrect .

Hence,C .