The word "obesity" (Line 2, Para. 1 ) most probably means ______.

A．Americans' standard of living is relatively low in the 1970s.
B．Americans are on average consuming 200 calories every day.
C．Farms are responsible for American overconsumption of calories.
D．Diabetes is the unavoidable result of Americans' consuming corn.

A．Overproduction of corn products leads to overweight.
B．Corn is the most popular portable product in America.
C．Corn processing is a powerful industrial logic at work.
D．A balanced diet of corn is beneficial to one's life span.