Which of the following is a balanced equation for Copper (II) sulfate + aluminum --> aluminum sulfate+solid copper?

A. CuSO4(aq)+Al(s) --> Al2(SO4)3(aq)+Cu(s)
B. 3 CuSO4(aq)+2Al(s) -->Al2(SO4)3(aq)+Cu(s)
C. 3 CuSO4(aw)+2Al(s) --> Al2(SO4)3(aq) +H(g)