The correct answer to this open question is the following.
What were Khrushchev's likely motivations in delivering his "Secret
Speech"?
The main motivation of Nikita Khrushchev in addressing the 20th Congress of the Russian Communist Party was to express a severe critic of Joseph Stalin'spolicies as the Soviet Union leader.
Nikita Khrushchev's secret speech was delivered on February 25, 1956, after the death of General Joseph Stalin. Nikita Khrushchev wanted to eliminate the image and presence of Stalin's decisions in the USSR politics and to move the nation into the model proposed by Vladimir Lenin.
During the speech, Nikita Khrushchev condemned decision's made by Joseph Stalin before, during, and after World War II.
This speech is called secret because it remained like that for 33 years until it was revealed in 1989.