Many Temperate Regions Are Affected by Climate Change

Many temperate regions are affected by climate change.Which of the following investigations would lend understanding to the future distribution of organisms in temperate regions?

A) Remove,to the mineral soil,all the organisms from an experimental plot,and monitor the colonization of the area over time in terms of both species diversity and abundance.
B) Look at the climatic changes that occurred since the last ice age and how species redistributed as glaciers melted,then make predictions on future distribution in species based on past trends.
C) Quantify the impact of humankind's activities on present-day populations of threatened and endangered species to assess the rate of extirpation and extinction.
D) There is no scientific investigation that can help make predictions on the future distribution of organisms.