ANSWER: A. A factory does not clean its workspace every night.
EXPLANATION: The National Consumer's League is an American consumer organization founded in the year 1899. It advocates for consumers on marketplace and workplace issues. They voiced for safer and secure workspace, fair working conditions, protected workers from exploitation by employers, promoted food inspection and advocated for child labor restrictions, the limiting of work hours and establishing minimum wage laws for women. So, it can be guessed that they are protesting for factory's clean workplace.