Concept:Ghanaian citizenship by birth is mainly based on Ghanaian parentage or ancestry, not residence, school, or work.
Explanation:Under the 1992 Constitution of Ghana, a person can claim Ghanaian citizenship by birth if at least one of his or her parents or grandparents is a Ghanaian.
Attending school, working, or having parents merely residing in Ghana does not automatically grant citizenship.
Therefore, the correct condition is having Ghanaian grandparents.
Answer:A. his/her grandparents are Ghanaians.