Why Are High-Power Couples (I

Why are high-power couples (i.e., both people have at least a college degree) more likely to migrate to large urban areas compared to low-power couples (i.e., neither person has a college degree) ?

A) Urban areas offer a greater array of job opportunities and wages for educated people compared to rural areas and, therefore, living in an urban area reduces the likelihood of someone in a high-power couple being a tied-mover or tied-stayer.
B) Urban areas offer more college opportunities and at a lower price than typical rural areas.
C) High-power couples are not very willing to move after college.
D) Low-power couples cannot afford the costs associated with moving to an urban area.
E) There are very few low-skill jobs in urban areas.