Final answer:
The phrase suggests that there has been a significant change in mustache styles in the last several centuries, indicating an increase in the creativity and variety of mustache styles.
Step-by-step explanation:
The phrase "However it is the last several centuries that mustaches have undergone a more creative transformation" implies that in the past centuries there has been an evident and significant change in the styles and the ways mustaches are fashioned compared to ancient times.
This can be best inferred as C. Individuals are creating more mustache styles than existed in the ancient history. The evolution in mustache styles might be partly due to the availability of better grooming tools like sharpened razors and mustache wax, as well as a greater cultural emphasis on personal expression and aesthetic creativity.
It does not comment on the easiness of styling, people's overall creativity compared to ancient times, or the prominence of facial hair. Instead, it suggests a historical development in the way mustaches are styled.