Which of these are reasons why excavations in the 20th century helped to build a better understanding of the Aztecs? 1.Because they showed the sacred district had many different layers to it 2.Because they uncovered several stone sculptures such as the Calendar Stone 3.Because they proved the Spanish destroyed Tenochtitlan with the help of the Tlaxcalans 4.Because they illustrated the Aztecs were skilled artists who collected art from earlier civilizations it can be more than one answer