Which option is an example of a citation?

O A. Paul, Nikko. "Dust." Line drawing. The Artist's Page. Artists

Unlimited, 1 February 2005. Web. 5 April 2013.

O B. Though dust storms pose a serious threat to those caught in their

path, their harsh beauty is undeniable.

O c. This line drawing captures both the unrelenting horror and

majestic raw beauty of a dust storm.

O D. Dust storms are extremely dangerous, and people should heed

warnings to find shelter when one is coming.