Which sentence has a pronoun usage error? a. thomas was supposed to pick me up, but he’s late. b. she drove herself to the performance, but left early. c. the judges showed their scoresheets to the contestants. d. the audience left its seats after curtain call.

Its D.

Explanation:

the direction of the magnetic field produced by an electric current will change when the direction of the electric current changes. for example : if a current is flowing in a straight length of wire, the magnetic field is described by a concentric circle (using right-hand rule).