Who’s the primary audience?

C. To all South Africans

Explanation:

Mandela's Inaugural speech were he made that comment on the excerpts was to remind the South Africans about what they passed through during the Apartheid regime and his honest and earnest wish that, the country, South Africa and its people would never experience such again.

During the regime, he was jailed for demanding accountability and equal respect towards the black south Africans. There was widespread segregation of the South Africans due to their skin color during the Apartheid regime.

the answer is:

apprehensive.