The General Manager is quite tactful and handles the workers union very effectively.

The correct answer is A. relaxed.

A relaxed person is calm and composed, and is not easily upset or stressed. This is important in a General Manager, as they need to be able to handle difficult situations with the workers union. A strict person is too rigid and inflexible, and may not be able to compromise with the workers union. A naive person is too trusting and may be taken advantage of by the workers union. A disciplined person is well-organized and follows rules, but this is not as important in a General Manager as being relaxed.

Here are some additional details about each option:

• A relaxed person is calm and composed, and is not easily upset or stressed. This is important in a General Manager, as they need to be able to handle difficult situations with the workers union.
• A strict person is too rigid and inflexible, and may not be able to compromise with the workers union.
• A naive person is too trusting and may be taken advantage of by the workers union.
• A disciplined person is well-organized and follows rules, but this is not as important in a General Manager as being relaxed.