Which statement is true for all minerals?

A.
They have a crystalline structure.

B.

They contain useful metals.

C.

They are made of silicon and oxygen.

D.
They are too hard to be scratched with a nail.

Question

Which statement is true for all minerals?  
 
 

 
 

  

  A. 
  They have a crystalline structure.   
   

 
 

  

  B. 
 
They contain useful metals.
   
   

 
 

  

  C. 
 
They are made of silicon and oxygen.
   
   

 
 

  

  D. 
  They are too hard to be scratched with a nail.

anonymous · Answer

A. they ALL have a set structure

anonymous · Answer

but A is definitely a requirement for a mineral. It has to be there for the mineral to BE a mineral.

anonymous · Answer

by definition, they have a regular structure (repeatable and repeating organization of the atoms in space). I don't know what all else were your choices, but A is definitely a requirement for a mineral. It has to be there for the mineral to BE a mineral.

anonymous · Answer

Minerals must have a structure, be a solid, inorganic, and I forgot the other 2 ones

anonymous · Answer

so the is a the right answer or no

anonymous · Answer

A is 100% right

anonymous · Answer

ok

anonymous · Answer

"So is a the right answer?" or " So the right answer is a?"