【正确答案】 D

【答案解析】通过原文“One reason for this is that many older people are changing their professions．They are looking for different careers．Another reason is that repair costs have increased．Adults are taking courses like plumbing and electrical repair．This way they hope that the high costs for repairs can be avoided．Advanced technology is the most important reason for the rise in adult education”，可以归纳出ABC三项。