Answer:
C. Dalton, Charles. "The Great Barrier Reef." Discovery, June 2003, pp. 32-38.
Step-by-step explanation:
Magazine articles are cited as: Author's Last name, First name. "Title of the Article." Title of the Magazine. Publication Date, pages of the article.
Dalton, Charles. "The Great Barrier Reef." Discovery,
June 2003, pp. 32-38.
The citation above is written correctly.