Beth made the chart shown. Which headings best complete the chart?

A 2-column table with 1 row. The first column labeled X has entries Wall clock, T V remote control, Portable music player. The second column labeled Y has entries Refrigerator, Table lamp, Hair dryer.

a
X: Powered by Current Y: Powered by Magnetism
b
X: Powered by Magnetism Y: Powered by Current
c
X: Use AC Y: Use DC
d
X: Use DC Y: Use AC