Though Many Factors Are Involved,this Particular Factor Is Considered to Be

Though many factors are involved,this particular factor is considered to be the cornerstone of any successful diversity initiative.
Which of the factors below showing the extent to which an organization's policies and practices support a pro-diversity culture best match this statement? 

A) Top management support/commitment
B) Remove obstacles
C) Organizational policies/practices
D) Heightened awareness
E) Diversity as a criterion for measuring success
F) Training and education