I'm going between answer A and C, because usually a reduction of ones habitat anymore is due to human impact instead of temperature.
A would be a good answer because if more and more land was being lost to the gators, they would have to dwell in the water more.
C also would be a good answer because if something major was to happen to the gators, such as a sudden decrease in land and/or water habitat, they might not be able to handle the sudden change and die.
Franklin Roosevelt delivered the "Day of Infamy" speech after the attack on Pearl Harbor. He delivered the speech to tell the people of the USA that he will not allow this act to go unpunished.