I believe the answer is: Mulattos
In the past, Panama was colonized by the european empire due to their natural resources. In the process, The European empire bought a lot of slaves from Brazil and Africa to work in the plantations.
As the years goes by, these three cultures assimilate with one another and make up the majority of population in Panama.
B. Nationalist leaders emphasized the things the tribe had in common
Yes.
And to help for later questions like this one, remomber that Spain colonized for the 3 G's: gold, God, and glory.
The answer is... C) orally