Answer
B+C, A+B, A+C
Work Step by Step
We can find the x-component of each vector:
$A_x = 4$
$B_x = -1$
$C_x = 1$
We can find the x-component of each vector sum:
$A+B$: The x-component is 4-1 which is 3
$B+C$: The x-component is -1+1 which is 0
$A+C$: The x-component is 4+1 which is 5
We can rank the vector sums in order of increasing x-components:
B+C, A+B, A+C