It is a modifying phrase considering of a preposition and it's object a noun out a pronoun. Hope this helps.
Answer:
The people of the valley got the idea that the prophecy was about to come true when they heard about Mr. Gathergold. He was a native of the valley who left long back but became very rich because of his skills.
A good persuasive speech "presents two sides equally".
The answer is B. Poster of Big Brother.