re: Hypothetical legal question regarding a driving scenario

I do not know what the law is in Louisiana, but up here a jury would have to decide:

Was driver A negligent? While it could be argued that entering the intersection on a red light is a negligent act, A could argue that he was not negligent and was acting as a reasonable person would under the circumstances and, therefore, he is not responsible for the accident with C.

While driver B may be negligent in his driving, he would argue that his negligence is not the proximate cause of the accident between A and C.

It is solely within the province of the jury to decide questions of negligence, contributory negligence and proximate cause up here. C could win or get goose egged.