Which sentence correctly uses a comma to separate the introductory phrase?
Asked by maham237 @ in English viewed by 391 People
Which sentence correctly uses a comma to separate the introductory phrase? Before researchers are granted access to the rare-book stacks, they must be approved through a security screening process. Before, researchers are granted access to the rare-book stacks they must be approved through a security screening process. Before researchers are granted access, to the rare-book stacks they must be approved through a security screening process. Before researchers are granted access to the rare-book stacks they must be approved through, a security screening process.