Which is a sentence fragment? A. On the front door was pinned a note. B. Stop! C. Construction paper, scissors, and paintbrushes in a pile on the table. D. Waiting patiently in the lobby was a small boy.

The asnwer is C because the information isn't sufficient enough to be a complete sentence. What about the supplies on the table? Is someone acknowledging that they're there? Does that make sense; they aren't supplying enough information about the supplies on the table.

c because it doesn't have a predicate