B. Facts from a documentary about mechanical and artificial hearts.
Sorry, never heard of that:(
Answer:
I think it's A because article noun cannot be used Infront of uncontactable noun if it is not properly mentioned
1. If my memory serves me well, Lincoln's focus in the Gettysburg Address was to <span>describe the importance of the union and freedom. (D) Lincoln's main purpose was to describe what impact had the war on the country. He d</span>enounced the injustices of the nations law.<span>
2. I am definitely sure that the </span>purpose of Martin Luther King, Jr. writing "Letter from Birmingham Jail" was to <span>defend his actions, react to a statement, share his opinions regarding segregation. Letter from Birmingham Jail has many things in common with Lincoln's Gettysburg address.</span>