A fuel and oxidant system consisting of N,N-dimethylhydrazine $$(CH_3)_2NNH_2$$ and $$N_2O_4$$ (both liquids) is used in space vehicle propulsion. The liquid components are mixed stoichiometrically so that $$N_2$$, $$CO_2$$ and $$H_2O$$ are the only products. If all gases are under the same reaction conditions, number of moles of gases produced from 1 mole of $$(CH_3)_2NNH_2$$ is

A

3

B

6

C

9

D

4.5