I believe that Harriet Ann Jacobs used a pseudonym perhaps because it helped her to revisit a time she didn't want to relive. I hope this helps.
Answer:
We do generalize economic principles because the simplification and removal of clutter make analysis of problems easier.
Triumphantly is an adverb, so you would be looking for the verb that it modifies. I would choose the word “pressing.” Ask yourself, “how did he press down the alarm knob?” He pressed it triumphantly.
