The explantion above provided by the tutor and expert by
Magoosh is a perfect fit.
There no compromise in the answer choices: or positive or negative.
However, the second part of the sentence tells us that the interior was disappointing. That means the facade was good or shiny or in perfect condition or something like that.
Put you in front of the house you would like to buy: the decade was awesome and then you expect the interior is even better. Then you are inside and the house is a mess so , of course, you are even MORE disappointed because you thought very different
Only A and C are positive words but A means kitsch, extravagant.
Even though I do not know the meaning of August (the only word reminds me with this name is the 8th month of the year - vacation) must be the answer.
August= prestigious.
Regards