Considering the situation described above, the international orientations Mettle Inc., has adopted is known as "the ethnocentric approach."
This is because the ethnocentric approach is a method of recruiting individuals or personnel that fits the international businesses, based on requirements such as skills and zeal to imbibe the company's culture.
The ethnocentric approach is different from polycentric and egocentric approaches because it is based on meritocracy.
Hence, in this case, it is concluded that the correct answer is option B. "The ethnocentric approach."
Learn more about the ethnocentric approach here: https://brainly.com/question/10680001