B) 1 + 6x
Looking at the answer choices, we can already eliminate C and D, as they are not “sum” (addition).
We are left with choice A and B
A is a sum(addition) and subtraction.
It’s not A, because a PRODUCT (has to do with multiplication)
So, we are left with B, which is the answer.
B is a sum (+) and a product (x)
Hope that helps!