If in a Lead Storage Battery the Reaction at the Cathode

Multiple Choice

If in a lead storage battery the reaction at the cathode is:
PbO₂(s) + 4 H⁺(aq) + SO₄^2- (aq) + 2 e^- → PbSO₄(s) + 2 H₂O(l)
How many grams of lead sulfate are formed on one plate if 20.A average current occurs for 2.0 minutes? Assume 100% efficiency.

A) 0.063 g
B) 0.13 g
C) 3.8 g
D) 7.5 g
E) requires additional information