Which of the following economic factors would most likely contribute to the increase in China’s per capita GDP mentioned in this headline?

This one, and that one, and the one down there. (You didn't show us the headline OR the choices, so this is the best answer we can give you.)

Explanation:

tropical storm katrina, and it made landfall between miami and fort lauder-dale, florida, as a category 1 hurricane (a storm that, on the saffir-simpson scale, exhibits winds in the range of 74–95 miles per hour [119–154 km per hour]). sustained winds of 70 miles per hour (115 km per hour) lashed the florida peninsula, and rainfall totals of 5 inches (13 cm) were reported in some areas. the storm spent less than eight hours over land. it quickly intensified when it reached the warm waters of the gulf of mexico.

this should answer you're question