Americans under 50 and----with more education and income were more likely to self-Google because their jobs demand a certain online personaa that b those c ones d these
问题描述：
Americans under 50 and----with more education and income were more likely to self-Google because their jobs demand a certain online persona
a that b those c ones d these
答
B 这里说的是50岁以下的人和那些有着更好教育的50岁以下的人 这里为了减少头重脚轻 将前面的50岁以下的人用those代替