The western bantu-speaking people:
a. established independent city-states governed by rich merchants.
b. created priestly rule under the control of healers and spirit guides.
c. organized themselves into small-scale societies that relied on family and clan connections.
d. established centralized political systems whose kings ruled by divine right.
e. founded large-scale empires based on mobile military units.

c. organized themselves into small-scale societies that relied on family and clan connections.

Explanation:

The bantu-speaking people migrated from central and western Africa about 2000 years ago.

They had a group mentality and were usually divided into clans of about 100 to 1000 individuals.

The household which comprised of the man, his wife or wives, children and other relatives living together, were the smallest unit and also an important part of the bantu political structure.

Sub-chiefs governed societies consisting of groups of households living on the same hill or in the same valley within a village and chieftancy was passed down across families from father to eldest son.

we can solve this via the kinematic equation:

where the vertical velocity is zero and so:

since the height of the building is 29.3 meters then:

the ball was in motion for approximately 2.45 seconds