Why do most hyperthermophiles tend to be anaerobic?

A) Heated water dissolves high concentrations of sulfides and other reduced minerals.
B) The pH of high temperature water prohibits aerobic respiration.
C) All hyperthermophilic environments are deep beneath the sea.
D) At higher temperatures, the oxygen concentration of water declines.
E) Methanogenesis can only be performed anaerobically.