a. Rise of sea level, increase of shallow marine habitat, species diversification, climate change - mild and warm
b. Rise of sea level, decrease of shallow marine habitat, species diversification, climate change - mild and warm
c. Lowering of sea level, decrease of shallow marine habitat, increased species extinction, climate change - mild and warm
d. Lowering of sea level, increase of shallow marine habitat, species diversification, climate change - increased glaciation