While on an Expedition to Discover the Lost City of Atlantis

While on an expedition to discover the lost city of Atlantis in the Amazon basin, your party is captured by a group of people who have never contacted the outside world, cannot read or write, converse in a language that you do not recognize, and are pointing sharp spears at you. What is the BEST way of communicating that you are not a threat?

A) Try to converse in sign language.
B) Hold your hands up over your head.
C) Smile at them.
D) Draw a "peace" sign in the dirt.