Identify all the Australian Aboriginal writers out of the
following:
A. Kim Scott B. Peter Carey
C. Oodgeroo Noonuccal D. Kevin Gilbert
E. Derek Walcott
Choose the correct answer from the options given below:

The correct answer is A, C and D only.

Let us identify and examine the background of each of the writers listed in the question:
A. Kim Scott: He is a prominent Australian Aboriginal novelist of Noongar heritage. He has won the prestigious Miles Franklin Literary Award twice (for his novels Benang and That Deadman Dance).
B. Peter Carey: He is a world-renowned white Australian novelist, famous for winning the Booker Prize twice (for Oscar and Lucinda and True History of the Kelly Gang). He is not an Aboriginal writer.
C. Oodgeroo Noonuccal: Born Kathleen Jean Mary Ruska, she was an influential Australian Aboriginal writer, poet, artist, and activist. She was the first Aboriginal Australian to publish a book of verse (We Are Going in 1964).
D. Kevin Gilbert: He was an important Australian Aboriginal author, activist, poet, and playwright. His play The Cherry Pickers (1968) is widely recognized as the first written play by an Aboriginal writer.
E. Derek Walcott: He was a Saint Lucian poet and playwright, and the recipient of the 1992 Nobel Prize in Literature. He is not Australian.

Based on this analysis, the Australian Aboriginal writers are Kim Scott (A), Oodgeroo Noonuccal (C), and Kevin Gilbert (D). Therefore, the option "A, C and D only" is the correct choice.