In the circuit shown below, the key K is closed at t =0. The current through the battery is
A. `(V(R_(1)+R_(2)))/(R_(1)R_(2))` at `t=0` and `(V)/(R_(2))` at `t=oo`
B. `(V(R_(1)+R_(2)))/(sqrt(R_(1)^(2)R_(2)^(2)))` at `t=0` and `(V)/(R_(2))` at `t=oo`
C. `(V)/(R_(2))` at `t=0` and `(V(R_(1)+R_(2)))/(R_(1)R_(2))` at `t=oo`
D. `(V)/(R_(2))` at `t=0` and `(V(R_(1)+R_(2)))/(R_(1)R_(2))` at `t=oo`