Over Earth’s history, its climate has warmed and cooled as a result of natural factors. Which statement best uses evidence to evaluate possible contributions to the current warming trend?
A.
The current warming trend is most likely natural because it is similar to past warming trends and reflects changes in Earth’s part of the universe.
B.
The current warming trend may be caused by humans because it is much more rapid than in the past, and it corresponds with an increase in atmospheric greenhouse gasses released by humans.
C.
The current warming trend is most likely natural because it is similar to past warming trends and will most likely be followed by a cooling trend as occurred in the past.
D.
The current warming trend may be caused by humans because humans create litter, release pollutants, and build structures that harm natural ecosystems.