Answer:
C. President Kennedy.
Step-by-step explanation:
In his Presidential "Address Before a Joint Session of the Congress," newly installed President Lyndon Baines Johnson gave his speech for the first time. In his speech, he laments the untimely death of his predecessor John F. Kennedy. Being appointed President after the assassination of the then President, he had to take hold of the power to be the leader of the whole nation.
In his speech, he states how he (Kennedy) had worked on various issues as President and how it is important "to continue the forward thrust of America that he began". President Johnson also attributes the "the dream of conquering the vastness of space........ the dream of a Peace Corps in less developed nations" to his predecessor while also stating he will work on continuing the things he head left behind.