The bolded word here is the BESTSELLER. This kind of complement is a direct object complement. The adjective overnight denotes to the object bestseller which is an adjective. Another adjective complements another adjective, thus, the term direct object.
It is a creative work or idea
I agree with the person above - although this wouldn't be my first thought when I hear the word empower, among these answers, the one that seems the most correct is A. to create a strong desire or longing.
For example:
The desire to go home empowered me.
Answer:
Symbolism
Explanation:
Symbolism is a literary device that uses symbols, be they words, people, marks, locations, or abstract ideas to represent something beyond the literal meaning.