You Are Researching the Geographical Range of Semi-Tropical Tree Species

Multiple Choice

You are researching the geographical range of semi-tropical tree species. You hypothesize that recent shifts in the trees' ranges are due to global climate change. What aspects would be important in supporting your hypothesis? (Select all that apply.)

A) Focusing on the one or two tree species that show the most dramatic range shift
B) Including many tree species from a variety of plant families
C) Excluding any species that have not shown a recent range shift
D) Ensuring that the ranges of the included species cover most of the earth's semi-tropical regions
E) Focusing on a single semi-tropical region in order to gather more accurate data