What did Dalton's atomic theory teach?
Apex

Dalton's atomic theory taught that all matter composed of atoms (inseparable and cannot be destroyed).

Explanation:

Dalton's atomic theory, the initiative comprehensive approach to explain all matter based on atoms and its properties. He proposed this theory based on the law of mass conservation and constant composition law. The importance of Dalton's atomic theory are:

Everything consists of atoms, which are inseparable elements of matter and cannot be impaired. All element's atoms are identical. Atoms of different elements differ in their sizes and masses. Compounds are created by simply bonding atoms and creating complex atoms (molecules).

the answer is c. nacl