【单选题】

Mexico’s neighbors are the United States to the north and Guatemala andBelize to the south. Mexico is about one quarter of the size of the United States. Mexico has more than ninety million people. The language of Mexico is Spanish. This makes Mexico the world’s largest Spanish-speaking country.

MexicoCity is the capital and largest city of Mexico. The city is also very high. It is 7,349 feel high (2,240 meters). This makes it one of the highest capital cities in the worl
D、The population of MexicoCity grows bigger every lay.About thirty million people live there.
It has more people than any other city in the world, even more than Tokyo.
Mexico also has its specialties. Many of the foods we eat started in Mexico. Foods like beans, maize, avocados, tomatoes, peanuts, chili peppers, vanilla, and chocolate come from Mexico. Mexico is also famous for its cactus (仙人掌) plants. Mexico has more kinds of cactus than any other country.
The best title (题目) of the passage is ______.A．MexicoCity
B．Mexico’s plants
C．Mexico