Choose the sentence in which quotation marks are used correctly. A) ""Ode on a Grecian Urn" is my favorite poem of all time," he said.

B) ''Ode on a Grecian Urn' is my favorite poem of all time,' he said.

C) '"Ode on a Grecian Urn" is my favorite poem of all time,' he said.

D) "'Ode on a Grecian Urn' is my favorite poem of all time," he said.