when did the spanish conquistadors first set foot in the aztec capital, tenochtitlan?

a. 1510
b. 1521
c. 1428
d. 1519

d. 1519

The Spanish conquistadors first set foot in the Aztec capital, Tenochtitlan, in option d. 1519.

To determine when the Spanish conquistadors first set foot in the Aztec capital, Tenochtitlan, we can analyze the given options and use a process of elimination.

a. 1510: We can eliminate this option because it is too early. Hernán Cortés arrived in Mexico in 1519, so it couldn't have been 1510.

b. 1521: This option is a possibility. The conquest of Tenochtitlan by the Spanish conquistadors, led by Hernán Cortés, took place in 1521. This includes the famous siege of Tenochtitlan and the fall of the Aztec Empire.

c. 1428: We can eliminate this option because it is too early. The Aztec Empire was established in the 14th century, so it couldn't have been 1428.

d. 1519: This option is a possibility. Hernán Cortés and his men arrived in Mexico in 1519, and soon after, they made their way to Tenochtitlan. However, the actual conquest and fall of Tenochtitlan took place in 1521.

Considering the options provided, the correct answer is:

b. 1521