If a closed loop lies partially inside and partially outside a region of changing magnetic field, which is true about calculating the induced electric field along the path? a. The electric field is zero at points within the region of changing magnetic field. b. We use the full area of the loop to calculate the electric field. c. We use only the area within the flux change to calculate the electric field. d. The electric field is zero at points along the path that are outside the region of changing magnetic field