Concept:Ghanaian citizenship by birth depends on Ghanaian parentage or grandparentage under the 1992 Constitution.
Explanation:The 1992 Constitution states that a person born in or outside Ghana becomes a Ghanaian citizen if, at the time of birth, either of the person's parents or grandparents is or was a Ghanaian citizen.
Option B, “his or her grandparents are Ghanaians,” satisfies this condition.
Attending school, parents merely residing in Ghana, or working in Ghana do not automatically confer citizenship.
Answer:B. his or her grandparents are Ghanaians.