Which one of the following is the most correct statement?

Glass is

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

The reason why solid $NaCl$ is a poor conductor of electricity is .......

When mechanical stress is applied to a crystal,a small amount of electricity is produced. This property is called ........

What type of semiconductor is obtained by doping $Ge$ with $As$ $(P, Sb, Bi)$?