Question

Which sentence correctly uses a comma to separate the introductory phrase? @C.A.M


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.

Answer 1

I think the first one.

Answer 2

bubbles ur right its the first one

Answer 3

awesome c: