Concept:The sentence connects two negative points about the house, so the missing word must mean “in addition” or “furthermore”.
Explanation:The first clause says the rent is too high.
The second clause adds that the house is not in a suitable location.
This second point is an extra disadvantage, not a result or a contrast.
The word “besides” means “in addition to that” or “apart from that”.
Thus, the sentence becomes: “The rent is too high; besides, the house is not in a suitable location.”
“Therefore” would show a result; “nevertheless” would show contrast; “in as much as” would show cause.
Answer:B. besides