What was one of president johnson's first official acts as president?
a. the creation of a national health care program
b. the signing of a civil rights bill
c. a proposal for great society programs
d. an investigation into the assassination of president kennedy

An investigation into the assassination of President Kennedy was one of President Johnson's first official acts as president. The correct option among all the options given in the question is option "A".Lyndon B. Johnson was born on 27th of August in the year 1908 and died on 22nd of January 1973. He was the 36th President of the United States of America. 

The correct answer is A. The creation of a national health care program

Lyndon B Johnson was the president after Kennedy's death and due to this he managed to pass many laws that Kennedy supported but were disliked by the congress. Johnson used this to pass acts regarding healthcare which weren't exactly universal but certainly helped numerous people who didn't have healthcare before. Civil rights bill signing came at a later time .