According to a study by the Carnegie Foundation for the Advancement of Teaching, companies in the United States are providing job training and general education for nearly eight million people, about equivalent to the enrollment of the nation's four-year colleges and universities.

• Aequivalent to the enrollment of  
• Bthe equivalent of those enrolled in  
• Cequal to those who are enrolled in  
• Das many as the enrollment of  
• Eas many as are enrolled in