20. A 1.0µF capacitor with an initial stored energy of 0.50 J is discharged through a 1.0 MΩ resistor. What is the current throughthe resistor when the discharge starts?
(A)1.0×10−3A 
(B)2.0×10^{−3A  
(C)1.0×10−2A  
(D)2.0×10−2A  
(E)5.0×10−2A}