What Was the Strength of Hofstede's (1980)survey of 75,000 Employees

What was the strength of Hofstede's (1980) survey of 75,000 employees from only one global company (IBM) when he developed his theory of values?

A) The organization was kept constant because he could show that organizational culture is a myth,and that national culture always take over the organization's cultures.
B) The organization was kept constant because any variation in value systems will,therefore,be due to national cultures rather than organizational differences.
C) The organization was kept constant because only IBM agreed to participate in the study.
D) none of these