Answer: C. Casual ambiguity
Step-by-step explanation:
Inimitability refers to having qualities that cannot be so easily copied. In business, it gives rise to a competitive advantage that sets you apart from others.
One reason for inimitability is casual ambiguity. This refers to when the background of a company does not seem to correlate with or explain how the company in question, came to be successful. This ensures that other companies are unable to understand what they are to do to become as successful as those companies.
It is the case here. Competitors are unable to understand how paintings and growing up in an orphanage are helping Michelle so they cannot copy her strategy.