Final answer:
The equation that represents the simplest SOP form for 3 variables is A * B * C.
Step-by-step explanation:
The equation that represents the simplest SOP (Sum of Products) form for 3 variables is c) A * B * C. In SOP form, each variable is multiplied together and then the products are summed. In this case, all three variables (A, B, and C) are multiplied together, resulting in A * B * C.