Which Roman numeral stands for the value 500?

The Roman numeral that represents the value 500 is represented by the letter D. In the Roman numeral system, specific letters are assigned values that correspond to certain numbers. D is specifically designated for 500, making it the correct representation of that value.

To understand the other Roman numerals for additional context, L represents 50, C stands for 100, and M indicates 1000. Each letter has its unique value, and knowing these symbols is essential for interpreting Roman numerals correctly. Therefore, recognizing that D corresponds specifically to the value of 500 confirms that it is indeed the right answer.