Use the circuit drawing in Figure 22-38 to answer questions 20 through 24. The battery produces 12.6 volts (6 cells at 2.1 volts each). The bulb burns very dimly with the switch on. 20. Would test A be needed with these symptoms or conditions? 21. What does test B tell you? 22. Test C would verify: (A) That electricity is not leaking through the bulb socket. (B) That the ground does not have low resistance. (C) That the ground does not have high resistance. (D) All of the above. (E) None of the above. 23. What would you learn from test D? 24. How would you repair the circuit problem?