Answer:
The djembe drum is said to have been invented in the 12th Century by the Mandinke tribe in what is now Mali, in West Africa. It has been played by West Africans for generations forming an integral part of ritualistic life in Mali, Guinea, Senegal and other neighbouring West African countries.
Explanation:
True (needs 20 or more characters to answer thing)
artists were highly valued members of society
This is a hard one to answer. The reason is that you are asked to distinguish between 2 schools of thought that are very close together. Not only that, but the characteristic you are looking for is not mentioned in either description.
Since semiotics brings in many more fields of study than does iconography, then I would go with iconography. This school of thought seems content just to find the symbols according to its description. What is done with them is mentioned in the other school but is not elaborated upon.
My answer would be iconography.