With this question, start by trying to achieve the maximum. With H and S in slots 1 and 7 (or reverse), we have [LO]-N and [G _ _ P] (or reverse) left.
It's possible to squeeze that all in to the remaining 5 slots, since LO can fit in between G and P.
We can eliminate any answer that doesn't start with an H or an S.
(A) & (E) are gone.
We'll need to place the G or the P second to make this work, so we can eliminate any answer that doesn't have that listed as second. (D) is gone.
Looking at (B) and (C), (B) jumps out as problematic since it places N third, though it would need to come after [LO]. Eliminate.
We're left with (C).