When the Oxidation-Reduction Reaction Shown Here Is Balanced Using the Smallest

Multiple Choice

When the oxidation-reduction reaction shown here is balanced using the smallest whole-number coefficients, how many moles of electrons are transferred? CH₄(g) + K₂SO₄(aq) $\rightarrow$ KHCO₃(aq) + KHS(aq) + H₂O(l)

A) 8
B) 6
C) 4
D) 2
E) 1