Which Statement BEST Describes the Current Status of Organizational Culture

Which statement BEST describes the current status of organizational culture measures?

A) There is no shortage of highly reliable and valid instruments
B) There are very few instruments with demonstrated reliability and validity.
C) Instruments to measure organizational culture are in development, but none exist at the present time.
D) The term "organizational culture" is an elusive concept with many meanings so it has been difficult for test developers to come up with acceptable tests.