Which of the following is an example of an on-demand service company?

Aggregation reduces the standard deviation of demand

A) only if demand across the regions being aggregated is perfectly positively correlated. B) only if demand across the regions being aggregated is not perfectly positively correlated. C) even if demand across the regions being aggregated is not perfectly positively correlated. D) whenever demand across the regions being aggregated is not perfectly positively correlated.

The major contribution of change-oriented and visionary leadership approaches is:

a. They are well researched. b. They provide easy ways to measure effectiveness. c. They apply well across cultures. d. They address interesting and visible aspects of leadership.