Training and development refers to the total structure of on-the-job and off-the-jobtraining systems used by the

The correct answer is A: organisation.

Let's break it down:
Training and Development: This is all about improving employees' skills and knowledge.
On-the-job training: Learning while working.
Off-the-job training: Learning outside of the regular work environment (like a classroom).

The organisation is responsible for creating and implementing these training systems. It's the organisation that benefits from having well-trained and developed employees.

Why the other options are incorrect:
B: experts: Experts might *deliver* the training, but they don't create the overall training system for the whole company.
C: candidates: Candidates are the *recipients* of training, not the ones who design the training system.
D: consultants: Consultants might *help* design or deliver training, but the organisation owns and manages the overall training structure.

Therefore, the total structure of on-the-job and off-the-job training systems is used by the organisation.