In the Fe-C system, which of the following describes pearlite? Choose all that apply An eutectic structure that forms at 0.76 wt% C. Not a phase, but a microstructure A eutectoid structure containing o-ferrite and Fesc A proeutectoid structure containing and Fejc A single phase with the BCT crystal structure In the Fe-C system, which of the following describes pearlite? Choose all that apply An eutectic structure that forms at 0.76 wt% C. Not a phase, but a microstructure A eutectoid structure containing o-ferrite and Fesc A proeutectoid structure containing and Fejc A single phase with the BCT crystal structure