Richard Leakey, the famous paleoanthropologist, Believes that man's influence on the biosphere is contributing to the extinction of hundreds of species on Earth each year. Within the next that 70°/° of life on Earth will be extinct. If he is correct, how will this graph following the 0 mark on x-Axis? A:There will be an immediate, huge spike upward
B:There will be a gradual but spike upward
C:There will be continued plateau for several hundred million years.
D:There will be a small dip and then the graph will take a gradual turn upward.