Answer:
C. A group of submissions that a publisher deemed inferior.
Step-by-step explanation:
In the context of publishing, the slush pile typically refers to a collection of unsolicited manuscripts or submissions received by a publisher. These submissions are often from aspiring authors and have not been specifically requested by the publisher. The slush pile is where these submissions are set aside and evaluated, with many of them considered to be of lower quality or not meeting the publisher's requirements.