Which of the following is not included in common unlawful infringement within the workplace?

The correct choice is the one that reflects an acceptable practice within the workplace rather than an unlawful infringement. Making workers perform tasks that align with their abilities and experience is generally considered a standard practice in a well-functioning work environment. This approach not only enhances productivity but also ensures that employees are appropriately matched to their roles, promoting efficiency and job satisfaction.

In contrast, the other choices represent violations of workers' rights and labor laws. Forced overtime without pay, harassment based on gender, and discrimination based on age all constitute unlawful infringement because they undermine the rights and well-being of employees. These practices can create a hostile work environment and may lead to legal repercussions for employers. Thus, the correct answer highlights a scenario that is legitimate and beneficial for both the employer and the employees, distinguishing it from the other options that illustrate problematic behaviors in the workplace.