Please answer the following question: Fact 1: If a planet becomes too hot then that planet cannot sustain life. Fact 2: Mercury is close to the Sun, and is extremely hot. Given the two facts above, answer the question "Mercury cannot sustain life because it is" with the following options: - too close to the Sun - harmful substances - dormant state - major threat to health - too cold - has little gravity - scarce resources - too small
A:
too close to the Sun