:)  economic productivity has declined in some countries as a result of: answer choices : 1)the bubonic plague. 2) an outbreak of sars 3)an ebola outbreak 4)the aids pandemic

I would go with Bubonic Plague.

Reasoning: While all of those answers had some result on economies, the bubonic plague (AKA Black Death) had the greatest economic effect. The more than 20 million that died across Asia and Europe produced a lack of workers that slashed economic growth while the laborers who still remained demanded higher wages due to the increase of work, causing continental economic havoc.