I believe it would be declarative because it is stating a fact.
Interrogative is a question and will allmost always end in a question marks.
Imperative is an order and will almost always end in a period.
Exclamatory shows excitement or concern ends most often with a exclamation mark.
Answer:
Your Majesties, Your Royal Highnesses, Honorable members of the Norwegian Nobel Committee, Excellencies, Ladies and gentlemen.
I have a purpose here today. It is a purpose I have tried to serve for many years. I have prayed that God would show me a way to accomplish it.
Sometimes, without warning, the future knocks on our door with a precious and painful vision of what might be. One hundred and nineteen years ago, a wealthy inventor read his own obituary, mistakenly published years before his death. Wrongly believing the inventor had just died, a newspaper printed a harsh judgment of his life’s work, unfairly labeling him “The Merchant of Death” because of his invention – dynamite. Shaken by this condemnation, t he inventor made a fateful choice to serve the cause of peace.
Seven years later, Alfred Nobel created this prize and the others that bear his name.
He smacked him in the face
I believe its A. Demonstrate responsibility making the restrictions unnecessary .