I think it's articulate because articulate means to speak out. So the people would have no opportunities to articulate their opposition. Answer: articulate.
The correct answer is B: The explores’ greatest enemies were bearded thieves, otherwise known as pirates, who launched surprise attacks in the middle of the ocean to empty ships of their treasures.
I believe it would be Grin is more devious than a smile is. A grin is usually referring to something sneaky or mischievous, while a smile is more polite.