It is TRUE that Voluntary migration often occurs for economic reasons; the "great migration" of African Americans of Chicago after WWI is an example of this type of movement.
This is evident in the fact that many African Americans of about six million moved from the rural areas in the Southern part of the United States to the urban areas in the Northern and Western parts of the country. The Great Migration period lasted between 1916 to 1970.
The correct answer is Samuel Dove is trying to locate his family.
In the newspaper advertisement says Dove "wishes to know whereabouts of" which means he is looking for his mother, sister and brother who were owned by Geo, probably the person who kept them as slaves.