<span>Fernando Henrique Cardoso</span>
Answer:
The Chinese laborers often did the most dangerous parts of the construction, including the dynamiting of mountain tunnels. Many men lost their lives constructing the transcontinental railroad; estimates range from 150 to 2,000. Most of these were Chinese Americans.
More than anything, the Spanish were seeking wealth.
Christopher Columbus himself thought that he had reached India: he wanted the wealth from the trade with Indians.
In the beginning, the Spanish hoped for Gold and Silver, later also for other products that could be made cheaper in the New World.
In short: the Spanish were not interested in Mexico but in what the ships could bring from Mexico (again, mostly gold).
Some, very few Spaniards, who settled in the New World were too unhappy in Europe and hoped for a better life.
They left rich soil when flood waters receded. So the correct option for the given question is option "d". It has been seen that rivers carry with them very rich and fertile soil which the farmers prefer because the amount of crop and the quality of crop is much better than they can get in any other place. The civilization of ancient Egypt as well as the Indus valley civilization were totally dependent on the Tigris and the Indus river respectively, as far as irrigation was concerned. Seasonal flooding always brings with it new fertile soil for irrigation.
