单选题 Old beliefs die hard; even when jobs became ______, the long-standing fear that unemployment could return at a moment"s notice persisted.
【正确答案】 C
【答案解析】[解析] 各选项的意思是:precious宝贵的,珍爱的;pervasive无处不在的,遍布的;plentiful丰富的,大量的;persuasive能说服的。根据句意可知,答案是C。