As Gondwanaland Broke Up,bands of Vegetation Developed Nearly 100 Million

As Gondwanaland broke up,bands of vegetation developed nearly 100 million years later.Forty million years later distinct vegetation and climate were established.From when Gondwanaland began to break up,which process do you think most likely unfolded?

A) Ecological speciation
B) All organisms evolved into unique species as a result of sympatric speciation
C) No speciation likely occurred
D) No process likely started because that is not enough time for any species to evolve

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