A pump station uses an induction motor that requires a complex power of:
$$S_1=20/_36.87^circ$$ kVA
and a synchronous motor that requires a complex power of:
$$S_2=10/_-53.13^circ$$ kVA
The total reactive power (kvar) required by the pump station is most nearly:
A. 4
B. 20
C. 22
D. 30