Final answer:
The ILO approach to combating child labor stresses all of the above strategies, including encouraging parents to migrate to the cities in search of work, banning child labor, and tackling the sources of poverty.
Step-by-step explanation:
The correct answer is (d) all of the above. The International Labour Organization (ILO) approach to combating child labor emphasizes multiple strategies to address the issue holistically. Encouraging parents to migrate to cities in search of work can help alleviate the economic pressures that lead to child labor. Banning child labor outright is another important step in eradicating the practice. However, the ILO also recognizes the importance of tackling the sources of poverty that contribute to child labor, such as by implementing poverty reduction programs and providing access to quality education for children.