Question

unequal distribution of wealth means that land and money are controlled by
a small number of people.
government officials.
a large number of people.
private business groups.

Explanation:

Unequal distribution of wealth implies concentration. A small number of people controlling land and money fits this concept. Government officials (could be part of a small group but not the general case), a large number (contradicts 'unequal' as it would be more equal), and private business groups (not necessarily the main entity in all cases of unequal wealth distribution) are less accurate.

Answer:

a small number of people.