[单选题]
A bar magnet falls through2 yln4rx jiak9gg/*9 v a loo us 9 z.fv89u4dv4zyqq1.lkfkp of wire with the north pole entering first. As the north pole entfudq49k. s849l.kyz vq vfu z1ers the wire, the induced current will be (as viewed from above)
A. zero.
B. clockwise.
C. counterclockwise.
D. to top of loop.
