Final answer:
The patented liquid-filled die agitator is better known as StirMark, which is used in the gaming industry to ensure a fair roll of dice. so, option c is the correct answer.
Step-by-step explanation:
The patented liquid-filled die agitator is known under the trademark c) StirMark. This novelty device is used to randomize the position of a die for various games and ensures a fair chance for each player by utilizing a liquid medium to agitate the die. The device is significant in the gaming industry where dice are commonly used.
The patented liquid-filled die agitator does not fall under any of the given trademarks. The correct trademark cannot be determined without additional information.
The patented liquid-filled die agitator containing a die having raised indicia on the facets thereof does not fall under any of the given trademarks. The options provided - AgitaPrint, FluidCraft, StirMark, EtchFlow - are not specifically associated with this particular product. It is important to note that trademarks are specific to individual brands and products, and without additional information, it is not possible to determine the correct trademark for the described liquid-filled die agitator.