What Are the Four Conditions That Facilitated the Growth of the School

What are the four conditions that facilitated the growth of the school counseling profession?

A) Growth of labor unions, use of foreign labor, extension of vocational education, and the multiple political party system
B) Roger's humanism, Merrill's vocational theory, Parson's trait/factor theory, and organizational systems theory
C) Division of labor, growth of technology, extension of vocational education, and the spread of modern forms of democracy
D) Division of labor, Roger's humanism, Merrill's vocational theory, and the spread of modern forms of democracy