What was a main flaw in Dalton's theory?

Explanation:

The main flaw in Dalton’s theory – i.e. the existence of both molecules and atoms – was later corrected in principle in 1811 by Amedeo Avogadro. Avogadro proposed that equal volumes of any two gases, at equal temperature and pressure, contain equal numbers of molecules.

answer; i believe the correct answer is (a)0

burning fossil fouls really decrease the carbon in the atmosphere so b