Answer:
c. It includes people who have special abilities.
Step-by-step explanation:
The folktale The People Could Fly by Virginia Hamilton tells the various folk stories of the African people. It includes stories such as that tells of slavery which put them in captivity, chaining them away from their 'ability to fly' and thus, decreasing their 'power'.
The given passage from the text claims that "long ago in Africa, some of the people knew magic". This gives them the ability to "walk up on the air like climbin up on a gate. And flew like blackbirds over the fields". This fact about the people being able to fly represents the element of folklore from the various tales for generations.
Thus, the correct answer is option c.