It'd be A.. You first would find which of them have a difference of 4. Which, is A, C, and D. Then, you'd multiply to see which of those three equal 96. 12*8=96
The equation made from this is:
Let x = each 500 grams
Cooking time = 30x + 20
2.5 kg = 2500 grams
2500 / 5 = 5
X = 5
We put this in to the equation,
30*5 + 20 = 170 minutes
It will take 170 minutes to cook a joint of meat weighing 2.5 kilograms
The answer would be 11 3/8 pounds for cat food