Amorphous solids have

Select the correct statements. (A) Crystalline solids have long range order. (B) Crystalline solids are isotropic. (C) Amorphous solid are sometimes called pseudo solids. (D) Amorphous solids soften over a range of temperatures. (E) Amorphous solids have a definite heat of fusion. Choose the most appropriate answer from the options given below.

A : Amorphous solids are isotropic. R : Amorphous solids are not rigid.

A : Amorphous solids are isotropic. R : Amorphous solids are not rigid.

Amorphous solids are