What Is the Most Important Difference Between Competency-Based Analysis and All

What is the most important difference between competency-based analysis and all other forms of job analysis discussed in the textbook?

A) Competency-based analysis is better at keeping pace with the quickly changing nature of work.
B) Competency-based analysis relies solely on information obtained from job incumbents.
C) Competency-based analysis focuses on how the job is currently done.
D) Competency-based analysis requires a very high degree of training on the part of the analyst.