Answer:
A. Upton Sinclair.
Step-by-step explanation:
The given line/ quote is from the book "The Jungle" by Upton Sinclair. The given line is Sinclair's description of the hands of the men who were working in the pickle room.
This book is Sinclair's take and way of criticizing the working conditions of the meatpacking industry. He described how the meat was at times contaminated, rotten, and even diseased leading to an uproar from the public. It then led to a new food safety law to be passed by the federal government.