**Answer:**

In the first box, B; in the second box, A; and in the third box, C.

**Step-by-step explanation:**

The sides marked on the triangle would be ranked in order from least to greatest as

n+3, 2n, 3n-2.

This is because for numbers greater than 3 (we are told that n is greater than or equal to 4), adding 3 to a number is less than multiplying it by 2.

Multiplying a number by 2 is less than multiplying a number by 3 then subtracting 2.

To test, use 4:

n+3 = 4+3 = 7; 2n = 2(4) = 8; 3n-2 = 3(4)-2 = 12-2 = 10.

The angles associated with these sides are across from them. The angle across from the side marked n+3, AC, is angle B. The angle across from the side marked 2n, BC, is angle A. The angle across from the side marked 3n-2, AB, is angle C.