Hello. Unfortunately it was not possible to find the text to which your question refers. However, I will try to help you in the best possible way.
The text must present the fact that many medical devices are energy dependent to function and many people need these devices to be always working to keep them in good health and even keep them alive. In that case, power outages are very serious problems for people who depend on these devices. In that case, to answer your question, you would need to find the sentence that addresses that information.
You forgot to put the paragraph.
A) affect is the best word to complete this
