Which statement is the least accurate regarding China's agricultural transformation?
A. China was predominantly a rural country until the 1990s.
B. The household responsibility system allowed peasants to sell on the free market once their obligation to the government had been met.
C. The Great Leap Forward was a highly successful way the communist government increased agricultural production and led to fewer starving people.
D. Only half of China's arable land is considered to be of good quality.
E. Food security is always a concern for the Chinese government.