Answer:
B
Step-by-step explanation:
first things first lets break this down
2a +5(b+7a)
thus you multiply 5 to b and 7a because its outside of the parenthesis
so that gives you 2a +5b+35a
so a is out
d is now out because when you simplify it is equivalant
so its either b or c
we can see in c that its 5b+35a+2a so adding the like terms gives 5b+37a so that is out as well which leaves B as your answer
hope this helped
