Final answer:
C in the equation represents the total cost of making n cakes, including both variable and fixed costs.
Step-by-step explanation:
In the equation C = 24n + 35, C represents the total cost of making n cakes. The equation includes a variable cost, which is $24 per cake, represented by the '24n' term where 'n' is the number of cakes. The fixed cost, which is the cost of equipment in this scenario, is represented by the constant value of $35. Therefore, option A) The total cost of making n cakes is the correct interpretation of what C represents in the equation.