Answer:
The answer is A.
Step-by-step explanation:
When you multiply by a negative number, you MUST change the sign.
Well for what I understood...
Let's say...
10 Pigs in total... Horses is 2 times more than pigs so
20 Horses in total... Cow is 4 times more than horses so
80 Cows in total...
The numbers are just examples of what I sort of understood.