When a solution is basic, the ph is always greater than

The answer is letter c

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).

If this is a true or galse then its true but if not then what is the question?

It is a ok  i know i have a brain functioning well.