Answer: -8n + 12
Step-by-step explanation: Well we know the word "sum" is a keyword that tells us to use addition so right off the bat, we can eliminate any options that have a subtraction sign.
"The sum of 12 and the product of -8 and n" means
we are multiplying -8 by n since "product" means multiplication.
Then we just have to add 12 to that.
So we get -8n + 12