Which sentence is punctuated correctly?

A.

"where have you been?" Ronald asked.

B.

Fred asked, "do you have an extra pencil, Adam?"

C

"I visit my grandmother at the nursing home," said Juanita, "at least once a week."

D.

"Boy," Darren replied, "You weren't kidding."

The sentence that is punctuated correctly is: "I visit my grandmother at the nursing home," said Juanita, "at least once a week." The correct answer is option C. The rule that applies here, is the use of commas to introduce or interrupt quotations. When the quotation is interrupted, the second part of the quotation must not start with a capital letter.