Option 1 - Assert that global warming is a hoax -> Give the Democrats some red meat.
Option 2 - Deny that global warming is a hoax -> Lose support from members of her own party.
Option 3 - Flee the interview -> Stay alive for now.
I know it's not what you want to hear, but after all, she is one of those slimy critters known as a politician. Democrat? Republican? Doesn't matter. Slime? Yea, definitely that. LOL.