They have been childless for years.
Aztecs were a Mesoamerican Indian culture that was devastated by Cortez and the Spanish in the 1520s.
Answer:
It was a direct result of the failure of the American politicians to back Woodrow Wilson sufficiently to ensure a fair and equal application of the Versailles treaty. Under that treaty, self determination for national groups was supposed to have been available to the Germans in Europe, just as much as the other nationalities. Vienna and Western Austria should have been incorporated in Germany from the start, and the grievance which resulted from denying this right gave the nazi party a huge boost.
Explanation:
The answer is "John B. Watson".
The Little Albert Experiment showed that classical conditioning,
the relationship of a specific stimulus or conduct with a disconnected stimulus
or conduct, works in people. In the investigation, John Watson was successful in
conditioning a formerly unafraid infant to result being afraid of a white rat.