Millcorp sells wetsuits for deep sea divers. It recently engineered a new material for its wetsuits to better hold in the wearer's body heat. After a close encounter with a shark, a customer discovers that the new material protects against shark bites $-$ an unintended benefit that Millcorp was not aware of$.$ Soon after, Millcorp's sales explode and it achieves $90\%$ market share in diver wetsuits. Which of the following best describes this situation?

$$ Millcorp can likely be found guilty of pursuing monopoly power.

Milhorp does not have a monopoly.

Millcorp has a lawful natural monopoly

$$ Millcorp has a lawful innocent acquisition of a monopoly.