Which of the following occurs when the strength of the current flowing through a wire is increased? a. the direction of the field changesb. the magnetic force is createdc. the magnetic field is increasedd. the magnetic field is decreased

A). No.  The direction of the field depends only on the direction of the current, not on its magnitude.

B). No.  The magnetic force was there as soon as there was any current. It didn't begin when the current increased.

C). Yes.  The magnetic field is increased.  More current causes a stronger magnetic field.

D). No.  The magnetic field isn't decreased.  More current causes a stronger magnetic field.