What are the functions of the animal welfare body according to Article 27?
I. Provide advice on animal welfare issues.
II. Advise on the application of the replacement, reduction, and refinement requirement.
III. Establish and review internal operating processes regarding animal welfare control, information communication, and monitoring.
IV. Advise on rehousing regimes, including appropriate socialization of animals to be rehoused.

a) I and II are correct.
b) II and III are correct.
c) I, III, and IV are correct.