Which of the following describes a reason why the population of the sunbelt increased after world war ii

Air conditioning technology made the area easier to live in and provided new spaces to live with a housing boom. 
Retirees became a large group and wanted new places to live to escape winters and take advantage of the new retirement communities. 
New industries such as oil, defense, and aerospace, attracted new workers. 

The goods the europeans wanted the most were gold, jewels, silk, perfumes, and especially spices.