As the cameras flashed, a candidate posed with company officials at the ribbon-cutting ceremony at a new factory. This is an example of a __________

What is NOT needed for a causal explanation?

A) time order B) spuriousness C) association D) ruling out of alternative causal factors

The major global force that has allowed antiretroviral treatments to become more affordable to those affected by HIV and AIDS is ______.

A. global governance B. global markets C. information and communications technology D. shifting centers of power