D

Step 1: Analyze the dimensions of the given quantities. The operations presented include addition, subtraction, and multiplication of two different dimensional quantities, which are generally not meaningful in physics.
Step 2: Both addition (A + B) and subtraction (A - B) cannot be performed on quantities with different dimensions.
Step 3: The multiplication (A × B) of two quantities of different dimensions can yield a new quantity, but it depends on the physical context. However, generally, operations involving different dimensions are either meaningless or need additional conversion context.
Conclusion: Given that none of the operations listed have a standard meaning under the laws of physics when applied directly to quantities with different dimensions, the correct answer is D: none of these.