Which sentence is punctuated correctly?

A.

Four score and seven years ago, began Abraham Lincoln.

B.

"I'm more than happy," said the author, "to autograph a copy of my new book."

C.

"It seems, Shayla said, that I have lost my keys."

D.

Stop right where you are, "the police officer told the suspect."

The sentence that is punctuated correctly is: "I'm more than happy," said the author, "to autograph a copy of my new book." The correct answer is option b. This is an example of an interrupted direct quotation. The rule applied here is that, you should use commas to introduce or interrupt quotations.