If We Succeed in Detecting Signals from Other Civilizations in Space,what

If we succeed in detecting signals from other civilizations in space,what method of communication will prove to be the fastest?

A) Neutrinos,because a beam of these particles,suitably modulated,can be made to travel almost infinitely fast because they can penetrate almost anything very easily
B) Nuclear-powered rockets,because we can then use unlimited power to accelerate these systems to almost infinite speeds
C) Laser light,because this single-wavelength light can be directed into an extremely narrow and intense beam and can therefore be made to travel much faster than ordinary light
D) It does not matter what is used because the speed of light can never be exceeded by anything in our universe,thereby setting the communication speed limit.