The ethnographic method can provide the ability for one to: select one: a. prove one's own view of the world to others b. question the beliefs of the culture under study c. ask embarrassing questions about other cultures d. question one's own view of the world

The answer to this question is d. question one's own view of the world
In ethnographic method, the researchers will come down as one of the test subjects during the experiment.
This method allow the researchers to experience the situation based on others' point of view which gained them deeper understanding upon the situation

Ghana, first of the great medieval trading empires of western africa (fl. 7th–13th century). it was situated between the sahara and the headwaters of the sénégal and niger rivers, in an area that now comprises southeastern mauritania and part of mali.