Explanation:

- Encourages innovation: On-the-job training often exposes employees to diverse scenarios, encouraging creative problem-solving and fresh ideas.

- Enhances productivity: By learning while working, employees tend to pick up relevant skills faster, improving their efficiency and output.

- Promotes modern methods: On-the-job training keeps employees updated with the latest industry practices and technologies, ensuring they remain competitive.

- All of the above: On-the-job training contributes positively by fostering innovation, boosting productivity, and promoting the adoption of modern methods.