It says i have plus subscripton but whenever i log onto using my laptop, it says i don't have plus and whenever i try to ''purchase it'', it says i already paid for it??? like i'm genuinely confused.

Two students are discussing electricity that has a frequency of 60 hz. student a says that this type of electricity is referred to as ac. student b says that in this type of electricity, the electrons flow in only one direction. which of the following statements is correct? a. only student a is correct b. only student b is correct c. both of the two students are correct d. neither of the two students is correct