35. The Aztecs succeeded in developing a remarkable urban landscape. The population of Tenochtitlan and Tlatelolco combined with that of the cities and towns of the surrounding lakeshore was approximately 500,000 by 1500 C. E. Three causeways connected this island capital to the lakeshore. Planners laid out the urban center as a grid where canals and streets intersected at right angles to facilitate the movement of people and goods.

From Bulliet, The Earth and Its Peoples, 7th edition, p. 386.

Which of the following innovations provides the best evidence that the Aztecs used technology to adapt to their environment?
a. Construction of rope bridges
b. Chinampas
c. Domestication of llamas
d. The use of a barter system to get crops that were not indigenous to central Mexico