$4.-$ What is an important characteristic for highest and best truth for Plato?Select one. $(2$ pts$)$a$.$ It is a truth we've learned through wise instructors.b$.$ It is a truth we've concluded before anyone else.c$.$ It is a truth that was true and therefore was recorded.d$.$ It is a truth that has become more real over time.e$.$ It is a truth that never changes over time