If you were cited for CVC22350 and were exceeding the posted limit, more than likely what speed is "reasonable and safe" was previously determined by a traffic engineering survey, which established that speed limit as being the reasonable and safe threshold.
In such a case, your personal opinion as to what is reasonable and safe is meaningless, unless you are a qualified traffic engineer who has conducted your own survey that can credibly challenge the existing one.
Get a copy of the survey for that road and study it. Then determine if you have the expertise, training and background necessary to conduct your own survey and successfully challenge it. Otherwise, traffic school may look very tempting.
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