These are not clauses clauses need to have a subject and a verb, (NC)
Frederick Douglass, ... While both Douglass and Lincoln, inspired by the ideals of liberty and equality enshrined in the Declaration of Independence, agreed that slavery was immoral, they disagreed on the best method to abolish the institution. Frederick Douglass was a compelling force in the anti-slavery movement. A man of moral authority, Douglass developed into a charismatic public speaker.
The correct answer is C) While the first passage has a dark, horrifying tone, the tone of the second passage is much lighter. Hope this helps.
Answer:
New discoveries influence contemporary psychological perspectives because they provide new ways to look at things, or give new technology for new ways to diagnose problems and try to solve them.