Which of the following is a proper comparison between ductile and brittle fracture?

W) Ductile has an unstable crack and brittle has a stable crack

X) Brittle has relatively little plastic deformation, while ductile has extensive deformation

Y) Brittle doesn't occur in cold metals while ductile does

Z) Brittle fracture is preferred in most applications
X) BRITTLE HAS RELATIVELY LITTLE PLASTIC DEFORMATION, WHILE