Michelle, the CEO of Nariko Jets, an Airlines Company, Stated

Michelle, the CEO of Nariko Jets, an airlines company, stated that she owes the credit of her professional success to the time spent as a volunteer at a homeless shelter and her passion for artwork.She said that she learned to never stop dreaming from her work as a volunteer.Nariko Jets, according to Michelle, was the result of her combined efforts at life lessons that she learnt at the homeless shelter and her paintings which provided her the inspiration to help create passenger and jet airlines that would make travel easier and comfortable.Her competitors have always envied her success.Which of the following factors of inimitability is best reflected in this scenario?

A) First-mover advantage
B) Positive network externalities
C) Causal ambiguity
D) Tacit knowledge