Based on the phase diagram for methane (Figure 11.30), what happens to methane as it is heated from -250 to 0C at a pressure of 10 -2 a. It sublimes at about -200C. b. It melts at about -200C. c. It boils at about - 200C. d. It condenses at about -200C. e. It reaches the triple point at about -200C