This website has information on forms of Human observation to be pretty broad. It doesn't have anything specific with Bolivian villagers or there looms.
http://www.psychologydiscussion.net/behaviour/7-methods-of-studying-human-behaviour/540
You can often tell what a word means by its context in a sentence.
A is an example of false cause and effect
There is no concrete fact that diet soda can cause definite cancer prevention.
Both of the answers are C...
