[单项选择]It is the world’s fourth-most-important food crop, after maize, wheat and rice. It provides more calories, more quickly, using less land and in a wider range of climates than any Other plant. It is, of Course, the potato.
The United Nations has declared 2008 the International Year of the Potato. It hopes that greater awareness of the merits of potatoes will contribute to the achievement of its Millennium Development Goals, by helping to alleviate poverty, improve food security and promote economic development. It is always the international year of this or month of that. But the potato’s unusual history means it is well worth celebrating by readers of The Economist because the potato is intertwined with economic development, trade liberalisation and globalisation.
Unlikely though it seems, the potato promoted economic development by underpinning the industrial revolution in England in the 19th century. It provided a cheap source of calories and was easy to cultivate, so it
A. Lower price, quicker growing speed, less land required, and wider range of climate.
B. More calories, quicker growing speed, less labor required in growing and processing, and wider range of climate.
C. More calories, quicker growing speed, less land required, and wider range of climate.
D. More calories, quicker growing speed, less land required, and wider range of products to be made of.