White cast iron has

Answer: Option D

The correct answer is D: All of these
Let's break down why:

Option A: Carbon in the form of carbide - This is true. White cast iron gets its hardness and brittleness because the carbon is chemically bonded with iron to form iron carbide (Fe3C), also known as cementite.

Option B: Low tensile strength - This is also true. Tensile strength refers to how well a material resists being pulled apart. Because of the hard, brittle iron carbide structure, white cast iron is very poor at resisting tensile forces; it breaks easily when pulled or stretched.

Option C: High compressive strength - This is also true. Compressive strength refers to how well a material resists being crushed. The hard carbide structure in white cast iron *does* make it quite good at resisting compressive forces.

Since all three options (A, B, and C) are correct statements about white cast iron, the best answer is D: All of these.