Read the following passage and circle the letter A, B, C, or D to indicate the correct answer to each of the question

Over the past few years, working from home has become very popular all over the world. An increasing number of companies allow employees to work from home at least one or two days a week. There are also companies that hire only remote workers. While working from home can come with many benefits, there are also some drawbacks to consider.

The most common advantage is that it doesn't involve any commute to work. Many people spend more than 30 minutes each way travelling to their workplace and often have to deal with train delays or traffic jams during rush hour. Long daily commuting is also linked with increased levels of stress and anxiety, Therefore, people save time for getting extra sleep or eating a healthy breakfast if they work from home. Furthermore, working from home offers greater flexibility, which means employees can choose when to start and finish their working day as long as they complete all tasks on time and meet the deadlines. By having control over work schedules, people can attend to personal matters and achieve better work-life balance. For example, working mothers can take care of their children or adult learners can fit classes into their busy life.

However, working from home is not suitable for everyone. Some employees may feel isolated and lonely when they don't have much contact with their colleagues and organisation as a whole. They may miss the social interaction and creative atmosphere in the workplace. They may also prefer face-to-face supervision and meetings with managers or colleagues. Therefore, it would be difficult for these employees to complete their work on their own at home. In addition, when people work from home, they may find it hard to avoid distractions such as screaming children, dogs barking, or household chores. Even if they have a dedicated workspace in their home, it may not be easy for them to stay focused on their work, be efficient, and meet targets.

The word “their” in paragraph 2 refers to _______. A. people's B. employees' C. managers' D. adult learners'