The correct answer is B. Beef tenderloin
Step-by-step explanation:
"Demi-glace" is a term used in culinary to refer to a type of dark sauce used over meat especially pork or beef. This sauce is part of the French cuisine, due to this, it includes the word "glace" which means icing. Besides this, the traditional recipe includes a mixture of fond or broth along with Espagnole sauce that has a dark color, that is why demi-glace is also a dark brown sauce. According to this, you would put a demi-glace on beef tenderloin as this type of sauce is appropriate for pork or beef but not for vegetables, chicken, fish or other foods.