Answer:
Surgery, chemotherapy and radiation therapy
Explanation:
Insulin. Although it is made in the pancreas, insulin is the hormone.
The Republic of Korea. (Check my source of the World Cancer Research Fund first.)
it's very practical, because it's on base 10, so conversion between stuff like meters to kilometer is always just a multiplication with 10 to some power
like 1 km = 1000m (10³m)
or 1 m = 10^-3km = 0.001km
same reason for other SI units.
except time, that's base 60, or 12, or 24. that's more complicated, but there isn't any real competition
