One Factor That Contributed to the Feasibility of an All-Volunteer

 One factor that contributed to the feasibility of an all-volunteer force was 

A)  the absence of a credible threat to U.S. soil. 
B)  rising civilian unemployment and better military pay. 
C)  the generally low level of skills and education of volunteers. 
D)  the absence of qualified women volunteers willing to face combat. 
E)  increased levels of education.