Which of these corrects the shift of voice in the following sentence? Nakamura was praying for protection when the front door was flung open by force. A. Nakamura was praying for protection when the front door was flung open by the police. B. A prayer for protection was being said by Nakamura when the police flung the front door open. C. Nakamura was praying for protection when a force flung the front door open. D. A prayer for protection was being said by Nakamura when a force flung the front door open.