Which of the following is an accuratestatement?

Which of the following is an accuratestatement?
A. Step-up voltage transformers have a lower number of turns in the primary than in the secondary winding. B. Step-down voltage transformers have a different number of turns in the primary than in the secondary winding, so they change the incoming voltage to a higher voltage. C. DC Generators produce current with a voltage that changes from positive to negative. D. AC Generators produce current that is pulsating, but always remains positive.