Help please ! A B Or C

Answer:
B) 46
Step-by-step explanation:
What you have to do here is plug in the numbers 2, 3, 4, and 5 in for i in the equation and then add the sums together:
3(2) + 1 = 7
3(3) + 1 = 10
3(4) + 1 = 13
3(5) + 1 = 16
Add those together and they equal 46