E9H10 - Amateur Extra Class

E9H10 : How can the output voltage of a multiple-turn receiving loop antenna be increased?
A By reducing the permeability of the loop shield
B By utilizing high impedance wire for the coupling loop
C By increasing the number of turns and/or the area enclosed by the loop
D All these choices are correct
Correct Answer: By increasing the number of turns and/or the area enclosed by the loop