Answer:
Step-by-step explanation:
The answer is A.
3(12 + 6) gives you 36 + 18 because 3 times 12 is 36 and 3 times 6 is 18
I think it is 50, the first one, you will count 6, on each link 4 more is added so when adding 11 more links it would be 44+6 which is 50