formation of the supercontinent Pangea intense volcanic activity cooler temperatures rising sea levels
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which event most likely allowed for the explosion of mammal diversity that occurred during the Cretaceous period?
Possibilities:
- formation of the supercontinent Pangea
- intense volcanic activity
- cooler temperatures
- rising sea levels

cooler temperatures