"Every night I was oppressed by a slow fever, and I became nervous to a most painful degree; the fall of a leaf startled me, and I shunned my fellow creatures as if I had been guilty of a crime."

Frankenstein Isolation Quotes.

Explanation:

The isolation being portrayed by Victor, he feels alone on the journey to the University of Inglosladt, His isolation increases when he gets to school and the professors disapprove of his previous education. Victor's isolation is no longer only psychological but physical as well. He makes himself more isolated by spending so much time on his creation; and that has caused him to become ill, malnourished, and deprived of sleep. Obsessiveness has driven Victor into this state of mind which then pulls him away from any, and all, outside communication. A flaw in Victors character is bringing him to destruction and will eventually create something that he views as a monster. Also his isolation is evident by lack of visitation and letters to and from his family.

they can increase to boost the enonomy.

i would say b. research typically uses a variety of sources