Which of the Following Is True of Peter Senge's Contributions

Which of the following is true of Peter Senge's contributions to management thought and practices?

A) He has made several significant contributions to the areas of organizational learning and change.
B) He was the first person to discuss "management by objective" MBO) , by which a manager should be self-driven to accomplish key goals that link to organizational success.
C) He established the need for organizations to set clear objectives and establish the means of evaluating progress toward those objectives.
D) He advocated the application of scientific methods to analyze work and to determine how to complete production tasks efficiently.
E) He contends that bureaucratic structures can eliminate the variability that results when managers in the same organization have different skills, experiences, and goals.