Based on the content of paragraphs 7-9 of Mandela's speech, the two key ideas that can be selected are:
A. The anti-apartheid movement was a global effort against an unjust system.
E. The fight against apartheid was a stand against various forms of oppression.
These choices reflect the global nature of the anti-apartheid movement and the broader struggle against various forms of injustice and oppression that Mandela emphasizes in his speech.