Answer:
common knowledge
Explanation:
it's common knowledge because there's no words from the fr the speech, there no quotation and there's nothing about the speech, so it's not direct quotation, plagiarism or summary, so the most obvious is common knowledge
A poem or a haiku would most likely be the types of writing that uses stanza
D. "this was an uneasy secret..."
The conductor urged "All musicians should continue to practice for the remainder of the week."
This one looks the best to me. The only thing is there should be a comma next to, "urged"