According to Oravec, what serious challenges do students face in this era of rampant cheating and generative AI submissions? A Generative AI services are likely to increase in cost$,$ rendering education increasingly expensive. B More advanced AI submission detectors are likely to soon arrive that will force students to endure the tedium of actually doing work. C Cheating accusations or designations are often difficult for students to effectively dispute or defend. or D Outmoded and unqualified teachers are often incapable of reading at a level that would allow them to comprehend texts written by recent generative AIs.