A、Because it helps them to have greater academic qualifications. B、Because it helps them to gain work experience. C、Because they

Volunteering is a great way of getting involved. Most sporting events would never be possible without the support of the dedication of thousands of people. The Sydney Olympics was proof that the people of Sydney are capable of contributing to world class sporting events.
    Volunteering is a great way to gain work experience. When young people leave school or university they may have great academic qualifications but may lack the "work experience" which employers often require. Being a volunteer provides valuable work experience, although it’s not a paid role, it offers a variety of skills that could be of great value to any employer, e. g. working in a team, working unsociable hours, attending training, dealing with people, using initiative, etc.
    Organizing an event like the Olympics would not be possible without the support of volunteers in quite a number of areas, such as drink station assistants, medical support, baggage handlers, medal presenters, T-shirt distributors, timing assistants, to mention only a few here.