作后置定语还是作状语

The vision of UMassonline as a seamless division of the universityworked because “it fit with the culture of the institution,” says Wilson, whowas the CEO of UMassonline until 2003 ,when he became the president of UMass.

这里的as a seamless division of the university 是介词作后置定语修饰UMassOline？还是作状语修饰 worked？

The vision of UMassonline as a seamless division of the university worked because “it fit with the culture of the institution,” says Wilson, who was the CEO of UMassonline until 2003 ,when he became the president of UMass.

as a seamless division of the universi 紧靠在一个名词（词组）之后，之前并无动词，所以，这里作定语修饰前文，说明The vision of UMassOnline 的具体身份。