Which Variables Occur in Nature That Could Have a Negative

Which variables occur in nature that could have a negative impact on humans? Select all that apply.

A) The effect of climate change upon weather extremes (droughts, floods, and storms) .
B) Changes in rainfall and water supply for soil.
C) Ecology of microbial growth.
D) Risks for waterborne and foodborne pathogens in drinking water, seafood, and fresh produce because of climate variability.
E) There is an adequate food supply and always will be.