For an isotropic material, which of the following statements is/are correct ?

A. The properties are same at all the points throughout the material, but different properties can be there in three directions at a point.

B. The properties at a point are same in three different directions.

C. The property in two directions is same, but it is different in one direction at a point.

D. The properties are same at all the points throughout the material, and same properties observed in all three directions at a point.