Final answer:
Without knowing the context of who Trevor is in relation to Mandela's release, we cannot definitively determine his age. Nevertheless, Nelson Mandela's release in 1990 was a crucial milestone in South African history, leading to his eventual presidency and efforts towards national reconciliation.
Step-by-step explanation:
To determine how old Trevor was when Nelson Mandela was released from prison, we need specific dates. However, the information provided does not include Trevor's date of birth or any specific reference to a person named Trevor in relation to Nelson Mandela's release. But considering the fact based on the information given, Nelson Mandela was released in 1990 after 27 years in prison. If this relates to South African comedian and television host Trevor Noah, and if we know his date of birth which is February 20, 1984, we can calculate that he would have been 6 years old in 1990. However, this answer is not among the provided choices, and there is no additional context to definitively link Trevor to the provided age options without further information.
During his time in prison, Mandela became the most famous prisoner in the world and the face of the anti-apartheid movement. Following his release, he led South Africa through a period of reconciliation and served as its first African president after a victory in the multiracial elections of 1994. His presidency is noted for efforts to dismantle the legacy of apartheid by tackling institutionalized racism, poverty, and inequality, and fostering racial reconciliation.