The aztec built a powerful and wealthy empire by allying with spanish

A) militarily conquering other tribes and making alliances.

Explanation:

One of the reasons the Aztec empire achieved such a high level of wealth, development and stability is due to their alliances and conquest of other native groups. The Aztecs dominated the whole of the valley and exerted their power over dominions such as Texcoco, Tezozomoc, Azcapotzalco and Tlaxcala, which were also forced to pay a tribute to the Aztec Empire.

the berlin blockade was an international crisis that arose from an attempt by the soviet union, in 1948–49, to force the western allied powers (the united states, the united kingdom, and france) to abandon their post-world war ii jurisdictions in west berlin. in march 1948 the allied powers decided to unite their different occupation zones of germany into a single economic unit. in protest, the soviet representative withdrew from the allied control council. coincident with the introduction of a new deutsche mark in west berlin (as throughout west germany), which the soviets regarded as a violation of agreements with the allies, the soviet occupation forces in eastern germany began a blockade of all rail, road, and water communications between berlin and the west. on june 24 the soviets announced that the four-power administration of berlin had ceased and that the allies no longer had any rights there.

b)

it created free trade throughout the colonial territories.