@Genadel thanks for your message. Let's take a closer look at the stimulus here.
Premise: "In the Riverview Building, every apartment that has a balcony also has a fireplace."
B ==> F not F ==> not B
Premise: "None of the apartments with balconies is a one-bedroom apartment."
B ==> not 1BR 1BR ==> not B
Conclusion: "So none of the one-bedroom apartments has a fireplace."
1BR ==> not F F ==> not 1BR
Notice the flaw here.
We know that one-bedrooms do not have balconies, i.e. 1BR ==> not B.
Not having a balcony, however, is necessary to not having a fireplace, i.e. not F ==> not B.
The argument is clearly mistaking necessary for sufficient here, i.e. not B ==> not F, to then conclude that "none of the one-bedroom apartments has a fireplace."
1BR ==> not B ==> not F
Let's take a look at (C) now:
"no dog has fur since every cat has fur and no cat is a dog"
Premise: "every cat has fur"
C ==> F not F ==> not C
Premise: "no cat is a dog"
C ==> not D D ==> not C
Conclusion: "no dog has fur"
D ==> not F F ==> not D
This is the exact same flaw. We know that no dogs are cats, i.e. D ==> not C.
But not being a cat is necessary to not having fur, i.e. not F ==> not C.
So the argument here is once again mistaking necessary for sufficient, i.e. not C ==> not F.
D ==> not C ==> not F
Therefore, (C) would be the correct answer.
Hope that helps! Please let us know if you have any other questions.