The most credible and reliable support for the argument in favor of lowering the age to get a driver’s license to 14 years of age would be:
A professor of driving science recently observed that younger drivers have better eyesight and quicker reaction times than older drivers.
This evidence is based on scientific observation and research, which is generally considered more credible than anecdotal evidence or personal opinions. The expertise of a professor in driving science adds authority to the claim, making it a strong piece of supportive evidence for the argument.