The dictionary of occupational titles relates all vocational interests to:
1 things
2 data
3 people
4 all of these

The correct answer is 3. People.  

Explanation:

The DOT, is a publication of the various types of what and what each of them involve. Later on, it became obsolete and was replaced by an online database, which people with direct experience input the appropriate information. In this case, the missing word is people.

The DOT relates all vocational interest to people; as data an things cannot feel interest.

the african society basically suffered the consequences of colonization and apartheid directly attacking the black people, first, during the colonialism and its main idea which which "white people" had better rights, affecting   them principally in the right to establish black people in their territories, access to quality education and health services and took away any civil right even to the black people to feel they have the same opportunities as the settlers.