Ron is dreading setting up the Christmas tree because the lights are always a hassle. There is always at least one strand of lights that has a bulb out that prevents the string from lighting because the broken bulb breaks the circuit. He must test all the bulbs to determine which bulb is damaged and replace it before the light strand will work properly. If his lights were wired as a ________ circuit instead of a ________ circuit he could avoid this headache.
Responses
A progression, seriesprogression, series
B sequel, parallelsequel, parallel
C multiple, parallelmultiple, parallel
D parallel, series
