At the end of the power cord of a table lamp is a plug. A typical plug has two metal prongs that you insert into the two slots of an electrical outlet. The plug has two separate metal prongs because
A)	electrons flow toward the lamp through one prong and return from the lamp through the other prong.
B)	alternating current means that only one wire is actively transporting electrons at any given time. For half the cycle electrons flow toward the lamp through one prong and the other prong has no current through it. For the next half cycle, the roles reverse.
C)	a single prong offers the potential of a bad connection, which would cause it to overheat and possibly start a fire. Electric current flows toward the lamp through both prongs simultaneously, reducing the risk of fire.
D)	one prong carries the electric current and the other prong serves as a grounding wire, enhancing the safety of the lamp.
Answer:A
At the end of the power cord of a table lamp is a plug. A typical plug has two metal prongs that you insert into the two slots of an electrical outlet. The plug has two separate metal prongs because
A)	electrons flow toward the lamp through one prong and return from the lamp through the other prong. B)	alternating current means that only one wire is actively transporting electrons at any given time. For half the cycle electrons flow toward the lamp through one prong and the other prong has no current through it. For the next half cycle, the roles reverse. C)	a single prong offers the potential of a bad connection, which would cause it to overheat and possibly start a fire. Electric current flows toward the lamp through both prongs simultaneously, reducing the risk of fire. D)	one prong carries the electric current and the other prong serves as a grounding wire, enhancing the safety of the lamp.