During a cardiac​ arrest, what is the proper ventilation rate while doing compressions on an adult that does not have an advanced airway in​ place?

A.Give two ventilations after 30 compressions.
B.Give one ventilation every 6 seconds.
C.Provide one ventilation every 15 compressions during​ two-person CPR.
D.Give ventilations at a rate of 8 to 10 per minute.