For the Common Allotropes of Carbon (Graphite and Diamond), C(gr)

For the common allotropes of carbon (graphite and diamond) , C(gr) C(dia) with equilibrium constant K = 0.32. The molar volumes of graphite and diamond are, respectively, 5.30 cm³/mol and 3.42 cm³/mol; ΔH_f of diamond is 1.90 kJ/mol. These data suggest that the formation of diamond is favored at

A) low temperatures and low pressures.
B) high temperatures and low pressures.
C) low temperatures and high pressures.
D) high temperatures and high pressures.
E) None of these choices.