The correct answer is D) both figures "B" and "D". The reason for this is that figures "B" and "D" depict a changing magnetic field, which will induce the highest voltage according to Faraday's law of electromagnetic induction. In these figures, the magnetic field is changing due to the movement of the conductor, leading to a higher induced voltage compared to the stationary conductor in figures "A" and "C". The other options are incorrect because figure "A" has a stationary conductor, and figure "C" has a changing magnetic field but no conductor, both of which would result in a lower induced voltage compared to figures "B" and "D".