The changes in the skills needed for work in the new economy are prompted mainly by ______.

A．A worker's incompetence in shifting between roles.
B．Moderate competition in research and education.
C．The emphasis of collective efforts directed at a task.
D．More specialized jobs resulting from division of labor.

A．facilitating the acquisition of employability skills
B．understanding flexible and information-based technologies
C．preparing people for the challenges of the international workplace
D．strengthening the United States for competition with other countries